FOMY50 PGUM 240601 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 400 PM ChST Mon Aug 24 2026 GUZ001-241800- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 400 PM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 76 86 77 86 77 Temp 85 83 81 78 77 77 82 86 85 83 81 79 78 78 82 86 85 83 81 79 78 Dewpt 79 79 79 78 77 77 78 78 78 78 78 78 78 78 78 78 78 78 78 79 78 RH 82 88 94100100100 88 77 80 85 91 97100100 88 77 80 85 91100100 Wind dir SW SW SW SW SW SW W W W W W W W W W W W W W W W Wind spd 11 8 5 5 6 6 8 9 9 6 5 4 4 4 5 5 5 4 3 3 4 Clouds B2 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 50 40 40 40 30 QPF 12hr 0.53 0.56 0.44 0.35 0.28 Rain shwrs C C C C C C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S S Heat index 97 94 89 91 98 97 94 90 92 98 97 94 90 Max heat 97 96 86 91 98 96 88 92 98 96 88 High Surf Y Y Y Y Y Date 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 Mon 08/31/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 86 77 87 77 88 78 88 78 88 Temp 82 85 81 78 83 86 82 78 84 87 83 79 84 87 83 79 84 87 Dewpt 78 78 79 78 78 79 79 78 79 79 79 79 79 79 78 78 77 77 PWind dir W W W W W W W W W Wind char LT LT GN GN GN GN GN GN GN Avg clouds B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 40 50 50 40 40 40 40 40 Rain shwrs C C C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ001-241800- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 400 PM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 76 85 76 85 76 Temp 84 82 80 78 76 77 81 85 84 82 80 77 76 76 81 85 84 82 80 77 76 Dewpt 79 79 79 78 76 77 78 78 78 78 78 77 76 76 78 78 78 78 79 77 76 RH 85 91 97100100100 91 80 82 88 94100100100 91 80 82 88 97100100 Wind dir SW SW SW SW SW SW SW SW W W W W W W W W W W SW SW SW Wind spd 11 8 6 6 6 6 8 8 9 6 4 4 4 4 4 4 4 4 3 3 4 Clouds B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 50 30 30 30 20 QPF 12hr 0.27 0.20 0.20 0.14 0.17 Rain shwrs C C C C C S S S S C C C C S S S S S S S S Tstms S S S S S S S S S S S S S S S S S Heat index 96 92 86 89 96 95 92 86 89 96 95 92 86 Max heat 96 95 89 96 94 89 96 94 High Surf Y Y Y Y Y Date 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 Mon 08/31/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 85 76 86 76 87 77 87 77 87 Temp 81 84 80 76 82 85 80 76 82 86 81 77 83 86 81 77 83 86 Dewpt 78 79 79 76 79 79 79 76 79 79 79 77 79 79 78 77 78 78 PWind dir SW SW W W W W W W W Wind char LT LT GN GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 PoP 12hr 30 40 50 50 40 30 30 30 40 Rain shwrs C C C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ002-241800- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 400 PM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 77 86 77 86 77 Temp 86 84 81 79 78 78 82 86 85 83 81 79 77 78 82 86 85 83 81 79 77 Dewpt 79 79 79 79 78 78 78 78 78 78 78 78 77 78 78 78 78 78 79 78 77 RH 80 85 94100100100 88 77 80 85 91 97100100 88 77 80 85 94 97100 Wind dir S SW SW SW SW SW SW SW W W W W W W W W W W SW SW SW Wind spd 11 8 5 4 4 5 5 5 5 4 3 3 3 2 2 2 2 2 2 3 3 Clouds B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 50 20 20 20 20 QPF 12hr 0.16 0.12 0.16 0.16 0.13 Rain shwrs C S S S S S S S S S S S S S S S S S S S S Tstms S S S S S S S S S Heat index 99 95 90 92 98 97 94 90 92 98 97 94 90 Max heat 99 98 89 92 98 96 88 92 98 96 88 High Surf Y Y Y Y Y Date 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 Mon 08/31/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 86 77 87 77 88 78 88 78 88 Temp 82 85 81 77 83 86 82 78 84 87 83 79 84 87 83 79 84 87 Dewpt 79 79 79 77 79 79 79 78 79 79 79 79 79 79 78 78 78 78 PWind dir SW SW SW W W W W W W Wind char LT LT LT GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 30 30 40 40 30 30 30 40 Rain shwrs S S C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ003-241800- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 400 PM ChST Mon Aug 24 2026 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 77 86 77 86 77 Temp 86 84 82 79 78 78 82 86 85 83 81 79 78 78 82 86 85 83 81 79 78 Dewpt 79 79 79 79 78 78 78 78 78 78 78 78 78 78 78 78 78 78 79 78 78 RH 80 85 91100100100 88 77 80 85 91 97100100 88 77 80 85 94 97100 Wind dir S SW SW SW SW SW SW SW W W W W W W NW NW NW W SW SW SW Wind spd 11 6 4 3 4 5 5 5 5 4 3 2 2 2 2 2 2 2 2 2 2 Clouds B2 B1 B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 50 20 20 20 20 QPF 12hr 0.15 0.11 0.15 0.17 0.13 Rain shwrs C S S S S S S S S S S S S S S S S S S S S Tstms S S S S S S S S S Heat index 100 96 91 92 98 97 94 90 92 98 97 94 90 Max heat 100 99 89 92 98 96 88 92 98 96 88 High Surf Y Y Y Y Y Date 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 Mon 08/31/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 86 77 87 77 88 78 88 78 88 Temp 82 85 81 78 83 86 82 78 84 87 83 79 84 87 83 79 84 87 Dewpt 79 78 79 78 79 79 79 78 79 79 79 79 79 79 78 78 78 78 PWind dir SW SW SW W W W W W W Wind char LT LT LT LT GN LT GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 30 30 30 30 30 30 30 40 Rain shwrs C C C S C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$