FZPN27 KNHC 232155 OFFPZ7 Offshore Waters Forecast NWS National Hurricane Center Miami, FL 255 PM PDT Sun Aug 23 2026 Offshore Waters Forecast for the E Pacific within 250 nm of Mexico Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. PMZ001-241000- Synopsis for the E Pacific within 250 nm of Mexico 255 PM PDT Sun Aug 23 2026 .SYNOPSIS...Tropical Storm Iselle will move to 18.2N 116.3W Mon morning, 19.6N 117.8W Mon afternoon, strengthen to a hurricane near 20.8N 119.4W Tue morning, 21.4N 121.1W Tue afternoon, weaken to a tropical storm near 21.9N 122.8W Wed morning, and 22.4N 124.6W Wed afternoon. Iselle will change little in intensity as it moves to near 23.3N 128.4W Thu afternoon. A ridge will persist between Baja California and Iselle through about midweek supporting gentle to moderate NW to N winds north of Cabo San Lazaro. Stronger winds and higher seas are expected across the forecast zone between Cabo San Lazaro and Cabo San Lucas, including the Revillagigedo Islands, due to the proximity of Iselle. The forecast calls for storm conditions in the Revillagigedo Islands tonight, and storm conditions possible in the Revillagigedo Islands and the forecast zone between Cabo San Lazaro and Cabo San Lucas on Mon. The fresh to locally strong winds over the north and central parts of the Gulf of California will diminish by tonight. Fresh northerly gap winds will continue to pulse to strong speeds across Tehuantepec region mainly during the overnight and early morning hours through the next several days, with seas occasionally building to 8 ft. $$ PMZ009-241000- Mexico Border S to 30N within 60 nm of shore- 255 PM PDT Sun Aug 23 2026 .TONIGHT...NW winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .MON...W to NW winds 10 kt N of 31N, and variable less than 5 kt S of 31N. Seas 2 to 4 ft. Period 10 seconds. .MON NIGHT...NW winds 10 kt. Seas 2 to 4 ft. Period 14 seconds. .TUE...NW winds 10 kt. Seas 3 to 5 ft. Period 13 seconds. .TUE NIGHT...NW winds 10 kt. Seas 5 to 7 ft in S swell. Period 13 seconds. .WED...N of 31N, variable winds less than 5 kt, becoming S to SW 10 kt in the afternoon. S of 31N, variable winds less than 5 kt. Seas 5 to 7 ft in S swell. Period 12 seconds. .WED NIGHT...Variable winds less than 5 kt. Seas 4 to 6 ft in S swell. Period 12 seconds. .THU...N of 31N, variable winds less than 5 kt, becoming S to SW 10 kt in the afternoon. S of 31N, variable winds less than 5 kt. Seas 3 to 5 ft. Period 11 seconds. .THU NIGHT...N of 31N, variable winds less than 5 kt. S of 31N, variable winds less than 5 kt, becoming NW 10 kt late. Seas 3 to 5 ft. Period 10 seconds. .FRI...Variable winds less than 5 kt. Seas 3 to 5 ft in S to SW swell. Period 9 seconds. $$ PMZ011-241000- 30N to Punta Eugenia within 250 nm of shore- 255 PM PDT Sun Aug 23 2026 .TONIGHT...NW to N winds 10 to 15 kt. Seas 3 to 5 ft. Period 13 seconds. .MON...N winds 10 to 15 kt. Seas 3 to 5 ft. Period 12 seconds. .MON NIGHT...NW to N winds 10 kt. Seas 3 to 5 ft. Period 13 seconds. .TUE...Within 60 nm of the coast, variable winds less than 5 kt, becoming W to NW 10 to 15 kt in the afternoon. Elsewhere, N winds 10 to 15 kt. Seas 6 to 8 ft in S swell. Period 12 seconds. .TUE NIGHT...NW winds 10 to 15 kt. Seas 6 to 9 ft in S swell. Period 12 seconds. .WED...NW winds 10 kt. Seas 6 to 8 ft in S swell. Period 12 seconds. .WED NIGHT...NW winds 10 to 15 kt. Seas 5 to 7 ft in S swell. Period 11 seconds. .THU...W to NW winds 10 kt. Seas 4 to 6 ft in S swell. Period 10 seconds. .THU NIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft in S to SW swell. Period 9 seconds. .FRI...NW winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period 10 seconds. $$PMZ013-241000- Punta Eugenia to Cabo San Lazaro within 250 nm offshore- 255 PM PDT Sun Aug 23 2026 .TONIGHT...N winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .MON...NE winds 10 to 15 kt. Seas 5 to 7 ft in SE to S swell. Period 13 seconds. .MON NIGHT...W to NW winds 10 to 15 kt Within 60 nm of shore, and N to NE 15 to 20 kt Elsewhere. Seas 7 to 10 ft in S swell. Period 12 seconds. .TUE...Within 60 nm of shore, W to NW winds 10 to 15 kt. Elsewhere, NE to E winds 15 to 20 kt, shifting to S in the afternoon. Seas 8 to 12 ft in S swell. Period 12 seconds. .TUE NIGHT...SW to W winds 10 to 15 kt, shifting to NW to N late. Seas 7 to 10 ft in S swell. Period 12 seconds. .WED...NW to N winds 10 to 15 kt. Seas 6 to 8 ft in S swell. Period 11 seconds. .WED NIGHT...NW to N winds 10 to 15 kt. Seas 5 to 7 ft. Period 10 seconds. .THU...NW to N winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period 9 seconds. .THU NIGHT...NW winds 10 to 15 kt. Seas 3 to 5 ft. Period 9 seconds. .FRI...NW winds 10 kt. Seas 3 to 5 ft. Period 18 seconds. $$ PMZ014-241000- Cabo San Lazaro to Cabo San Lucas within 350 nm offshore N of 20N- 255 PM PDT Sun Aug 23 2026 .TONIGHT...SE to S winds 10 kt N of 22N, and SE 20 to 25 kt S of 22N. Seas 6 to 9 ft in SE to S swell. Period 12 seconds. Scattered showers and isolated tstms through the night. .MON...TROPICAL STORM CONDITIONS POSSIBLE. E to SE winds 15 to 20 kt N of 22N, and SE 25 to 30 kt S of 22N. Seas 9 to 13 ft in S swell. Period 12 seconds. Scattered showers and isolated tstms through the day. .MON NIGHT...SW winds 20 to 25 kt N of 22N, and S to SW 25 to 30 kt S of 22N. Seas 9 to 14 ft in S to SW swell. Period 13 seconds. Isolated tstms through the night. .TUE...W winds 25 to 30 kt, diminishing to 15 to 20 kt in the afternoon. Seas 7 to 11 ft in S to SW swell. Period 16 seconds. Scattered showers and isolated tstms through the day. .TUE NIGHT...W to NW winds 15 to 20 kt, shifting to N to NE 10 to 15 kt late. Seas 6 to 8 ft in S to SW swell. Period 10 seconds. .WED...NE winds 10 to 15 kt. Seas 5 to 7 ft in S to SW swell. Period 9 seconds. .WED NIGHT...N to NE winds 10 to 15 kt. Seas 4 to 6 ft in S to SW swell. Period 9 seconds. .THU...N to NE winds 10 kt. Seas 3 to 5 ft. Period 10 seconds. .THU NIGHT...NW to N winds 10 to 15 kt. Seas 3 to 5 ft. Period 17 seconds. .FRI...N winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period 18 seconds. $$ PMZ016-241000- From 17N to 20N Between 110W and 115W including the Revillagigedo Islands- 255 PM PDT Sun Aug 23 2026 ...TROPICAL STORM WARNING... .TONIGHT...TROPICAL STORM CONDITIONS. E of 113W, SE to S winds 25 to 30 kt, diminishing to 15 to 20 kt late. W of 113W, SE winds 35 to 45 kt. Seas 10 to 16 ft. Period 17 seconds. Scattered showers and isolated tstms through the night. .MON...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 15 to 20 kt E of 113W, and SE 30 to 35 kt W of 113W. Seas 10 to 16 ft in S to SW swell. Period 17 seconds. Scattered showers and isolated tstms through the day. .MON NIGHT...SE winds 10 to 15 kt E of 113W, and SE to S 25 to 30 kt W of 113W. Seas 9 to 14 ft in S to SW swell. Period 16 seconds. Scattered showers and isolated tstms through the night. .TUE...E winds 10 kt E of 113W, and SE 20 to 25 kt W of 113W. Seas 6 to 9 ft in S to SW swell. Period 11 seconds. Scattered showers and isolated tstms through the day. .TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. Period 9 seconds. .WED...E winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period 9 seconds. .WED NIGHT...E to SE winds 10 to 15 kt. Seas 4 to 6 ft in S to SW swell. Period 10 seconds. .THU...E winds 10 kt. Seas 3 to 5 ft. Period 10 seconds. .THU NIGHT...NE to E winds 10 to 15 kt. Seas 4 to 6 ft in S to SW swell. Period 17 seconds. .FRI...E winds 20 to 25 kt. Seas 4 to 6 ft. Period 18 seconds. $$ PMZ017-241000- Northern Gulf of California- 255 PM PDT Sun Aug 23 2026 .TONIGHT...SE to S winds 15 to 20 kt. Seas 2 to 4 ft. Period 9 seconds. .MON...N of 30N, SE to S winds 10 to 15 kt in the morning, becoming variable winds less than 5 kt. Elsewhere, SE winds 10 to 15 kt. Seas 3 ft or less. Period 8 seconds. .MON NIGHT...S to SW winds 10 kt. Seas 3 ft or less. Period 6 seconds. .TUE...Variable winds less than 5 kt, becoming SE to S 10 kt in the afternoon. Seas 3 ft or less. Period 6 seconds. .TUE NIGHT...S to SW winds 10 to 15 kt. Seas 3 ft or less. Period 9 seconds. .WED...SE to S winds 10 to 15 kt. Seas 3 ft or less. Period 10 seconds. .WED NIGHT...SE to S winds 10 to 15 kt. Seas 3 ft or less. Period 9 seconds. .THU...SE to S winds 10 to 15 kt. Seas 3 ft or less. Period 10 seconds. .THU NIGHT...SE to S winds 10 to 15 kt. Seas 3 ft or less. Period 4 seconds. .FRI...SE to S winds 10 kt. Seas 3 ft or less. Period 9 seconds. $$ PMZ019-241000- Central Gulf of California- 255 PM PDT Sun Aug 23 2026 .TONIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. Period 10 seconds. .MON...SE to S winds 10 kt. Seas 3 ft or less. Period 10 seconds. .MON NIGHT...SW winds 10 to 15 kt. Seas 3 ft or less. Period 9 seconds. .TUE...S winds 10 to 15 kt. Seas 3 ft or less. Period 11 seconds. .TUE NIGHT...S winds 10 to 15 kt. Seas 3 ft or less. Period 11 seconds. .WED...SE to S winds 10 to 15 kt. Seas 3 ft or less. Period 10 seconds. .WED NIGHT...S winds 10 kt. Seas 3 ft or less. Period 10 seconds. .THU...SE winds 10 kt. Seas 3 ft or less. Period 10 seconds. .THU NIGHT...SW to W winds 10 kt, shifting to S late. Seas 3 ft or less. Period 10 seconds. .FRI...SE winds 10 kt. Seas 3 ft or less. Period 10 seconds. $$ PMZ021-241000- Southern Gulf of California- 255 PM PDT Sun Aug 23 2026 .TONIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Period 10 seconds. .MON...SW to W winds 10 kt. Seas 3 to 5 ft. Period 12 seconds. .MON NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft. Period 11 seconds. Scattered showers and isolated tstms through the night. .TUE...NW winds 10 to 15 kt, shifting to S to SW in the afternoon. Seas 2 to 4 ft. Period 11 seconds. .TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. Period 10 seconds. .WED...SE to S winds 10 to 15 kt. Seas 2 to 4 ft. Period 10 seconds. .WED NIGHT...S winds 10 to 15 kt. Seas 3 ft or less. Period 10 seconds. .THU...S winds 10 kt, shifting to SW to W in the afternoon. Seas 3 ft or less. Period 10 seconds. .THU NIGHT...SW to W winds 10 to 15 kt. Seas 3 ft or less. Period 10 seconds. .FRI...SE to S winds 10 kt. Seas 3 ft or less. Period 15 seconds. $$ PMZ022-241000- N of 20N E of 110W to the Entrance of the Gulf of California- 255 PM PDT Sun Aug 23 2026 .TONIGHT...SW to W winds 10 to 15 kt. Seas 4 to 6 ft. Period 11 seconds. Scattered showers and isolated tstms through the night. .MON...W winds 10 to 15 kt. Seas 4 to 6 ft in S to SW swell. Period 13 seconds. .MON NIGHT...W to NW winds 15 to 20 kt. Seas 4 to 6 ft. Period 11 seconds. Scattered showers and isolated tstms through the night. .TUE...S to SW winds 15 to 20 kt, diminishing to 10 kt in the afternoon. Seas 4 to 6 ft. Period 10 seconds. Scattered showers and isolated tstms through the day. .TUE NIGHT...SW winds 10 kt, shifting to E to SE late. Seas 4 to 6 ft in S to SW swell. Period 10 seconds. .WED...SE winds 10 kt. Seas 3 to 5 ft. Period 9 seconds. .WED NIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft. Period 9 seconds. .THU...NW to N winds 15 to 20 kt, shifting to NW 10 kt in the afternoon. Seas 3 to 5 ft. Period 9 seconds. .THU NIGHT...W to NW winds 10 to 15 kt. Seas 3 to 5 ft. Period 12 seconds. .FRI...S to SW winds 10 kt. Seas 3 to 5 ft. Period 18 seconds. $$ PMZ024-241000- Colima and Jalisco within 300 nm offshore S of 20N and E of 110W- 255 PM PDT Sun Aug 23 2026 .TONIGHT...S winds 10 to 15 kt. Seas 6 to 8 ft in S swell. Period 11 seconds. Scattered showers and isolated tstms through the night. .MON...N winds 10 to 15 kt. Seas 5 to 7 ft. Period 11 seconds. Scattered showers and isolated tstms through the day. .MON NIGHT...NE winds 15 to 20 kt, shifting to E to SE 10 to 15 kt late. Seas 4 to 6 ft. Period 10 seconds. Scattered showers and isolated tstms through the night. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. Period 10 seconds. Scattered showers and isolated tstms through the day. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Period 10 seconds. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. Period 10 seconds. .WED NIGHT...SE to S winds 10 to 15 kt, shifting to W to NW late. Seas 3 to 5 ft. Period 9 seconds. .THU...N to NE winds 15 to 20 kt. Seas 3 to 5 ft. Period 9 seconds. .THU NIGHT...NE winds 10 to 15 kt, shifting to SE to S 15 to 20 kt late. Seas 3 to 5 ft. Period 16 seconds. .FRI...SE to S winds 15 to 20 kt. Seas 3 to 5 ft. Period 18 seconds. $$ PMZ025-241000- Michoacan and Guerrero within 250 nm offshore- 255 PM PDT Sun Aug 23 2026 .TONIGHT...NW winds 15 to 20 kt. Seas 4 to 6 ft. Period 13 seconds. Scattered showers and isolated tstms through the night. .MON...NE winds 15 to 20 kt. Seas 4 to 6 ft. Period 13 seconds. Scattered showers and isolated tstms. .MON NIGHT...E winds 20 to 25 kt, becoming NE to E 10 to 15 kt late. Seas 3 to 5 ft. Period 12 seconds. Scattered showers and isolated tstms through the night. .TUE...NE to E winds 10 to 15 kt. Seas 3 to 5 ft. Period 14 seconds. Scattered showers and isolated tstms through the day. .TUE NIGHT...S to SW winds 10 to 15 kt, shifting to N to NE late. Seas 3 to 5 ft. Period 13 seconds. .WED...Within 60 nm of shore, NW to N winds 10 kt in the morning, becoming variable winds less than 5 kt. Elsewhere, NE winds 10 to 15 kt. Seas 3 to 5 ft. Period 12 seconds. .WED NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. Period 12 seconds. .THU...N to NE winds 10 to 15 kt, shifting to SE to S in the afternoon. Seas 3 to 5 ft. Period 14 seconds. .THU NIGHT...SW to W winds 10 kt Within 60 nm of shore, and S 15 to 20 kt Elsewhere. Seas 3 to 5 ft. Period 16 seconds. .FRI...SW to W winds 10 to 15 kt. Seas 4 to 6 ft. Period 18 seconds. $$ PMZ026-241000- Oaxaca W of Puerto Angel within 250 nm offshore- 255 PM PDT Sun Aug 23 2026 .TONIGHT...NW to N winds 10 to 15 kt. Seas 3 to 5 ft. Period 13 seconds. Scattered showers and isolated tstms. .MON...N winds 15 to 20 kt. Seas 3 to 5 ft. Period 12 seconds. Scattered showers and isolated tstms through the day. .MON NIGHT...N to NE winds 15 to 20 kt. Seas 3 to 5 ft. Period 15 seconds. .TUE...NE to E winds 10 to 15 kt. Seas 3 to 5 ft. Period 16 seconds. Scattered showers and isolated tstms through the day. .TUE NIGHT...N of 14N, variable winds less than 5 kt, becoming N 10 kt late. S of 14N, E winds 10 to 15 kt. Seas 3 to 5 ft. Period 15 seconds. .WED...NE winds 10 to 15 kt, shifting to E to SE in the afternoon. Seas 3 to 5 ft. Period 15 seconds. .WED NIGHT...SE to S winds 10 kt. Seas 3 to 5 ft. Period 15 seconds. .THU...NE winds 10 kt, shifting to S in the afternoon. Seas 3 to 5 ft. Period 15 seconds. .THU NIGHT...S to SW winds 10 kt, shifting to SW to W late. Seas 4 to 6 ft in S to SW swell. Period 17 seconds. .FRI...N winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period 18 seconds. $$ PMZ028-241000- Oaxaca E of Puerto Angel within 300 nm offshore including the Gulf of Tehuantepec- 255 PM PDT Sun Aug 23 2026 .TONIGHT...N winds 25 to 30 kt N of 14N, and NE 15 to 20 kt S of 14N. Seas 4 to 6 ft. Period 13 seconds. Scattered showers and isolated tstms through the night. .MON...N of 14N, N winds 25 to 30kt, becoming NW to N 15 to 20 kt in the afternoon. S of 14N, NE winds 15 to 20 kt. Seas 5 to 7 ft. Period 12 seconds. Scattered showers and isolated tstms through the day. .MON NIGHT...NW to N winds 25 to 30 kt N of 14N, and NE 10 to 15 kt S of 14N. Seas 4 to 6 ft. Period 12 seconds. .TUE...NE winds 25 to 30 kt N of 14N, and NE to E 15 to 20 kt S of 14N. Seas 4 to 6 ft. Period 14 seconds. Scattered showers and isolated tstms through the day. .TUE NIGHT...N to NE winds 20 to 25 kt N of 14N, and E 10 to 15 kt S of 14N. Seas 4 to 6 ft. Period 12 seconds. .WED...N winds 20 to 25 kt N of 14N, and E 15 to 20 kt S of 14N. Seas 4 to 6 ft. Period 14 seconds. .WED NIGHT...NW to N winds 20 to 25 kt N of 14N, and E to SE 10 to 15 kt S of 14N. Seas 4 to 6 ft. Period 14 seconds. .THU...N to NE winds 20 to 25 kt N of 14N, and NE to E 15 to 20 kt S of 14N. Seas 5 to 7 ft. Period 15 seconds. .THU NIGHT...N of 14N, E winds 20 to 25 kt, shifting to N late. S of 14N, E winds 10 kt. Seas 4 to 6 ft. Period 14 seconds. .FRI...NE winds 20 to 25 kt. Seas 5 to 7 ft. Period 17 seconds. $$ PMZ029-241000- Offshore Chiapas E of 94W- 255 PM PDT Sun Aug 23 2026 .TONIGHT...E of 93W, N winds 10 to 15 kt in the evening, becoming variable winds less than 5 kt. W of 93W, E winds 10 to 15 kt, shifting to N late. Seas 3 to 5 ft. Period 10 seconds. Scattered showers and isolated tstms through the night. .MON...NW to N winds 10 kt, shifting to W in the afternoon. Seas 3 to 5 ft. Period 9 seconds. .MON NIGHT...SW to W winds 10 kt, shifting to NW to N late. Seas 3 to 5 ft. Period 10 seconds. .TUE...E of 93W, variable winds less than 5 kt, becoming SW 10 kt in the afternoon. W of 93W, NE to E winds 10 to 15 kt, shifting to S to SW in the afternoon. Seas 3 to 5 ft. Period 9 seconds. .TUE NIGHT...S to SW winds 10 kt, shifting to W to NW late. Seas 3 to 5 ft. Period 9 seconds. .WED...W winds 10 kt. Seas 3 to 5 ft. Period 9 seconds. .WED NIGHT...SW winds 10 kt, shifting to SE to S late. Seas 3 to 5 ft. Period 9 seconds. .THU...S winds 10 kt. Seas 3 to 5 ft. Period 8 seconds. .THU NIGHT...S to SW winds 10 kt in the evening, becoming variable winds less than 5 kt. Seas 3 to 5 ft. Period 9 seconds. .FRI...E of 93W, variable winds less than 5 kt, becoming S 10 kt in the afternoon. W of 93W, NE winds 10 to 15 kt, shifting to SE to S 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Period 12 seconds. $$ Forecaster GR