FOMY50 PGUM 220850 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 650 PM ChST Sat Aug 22 2026 GUZ001-221800- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 650 PM ChST Sat Aug 22 2026 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 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 88 78 86 77 Temp 84 81 79 78 78 84 88 87 85 82 80 78 78 82 85 85 83 81 79 78 Dewpt 79 80 80 79 80 80 80 80 80 80 80 79 79 79 79 79 79 79 79 78 RH 85 97103103107 88 77 80 85 94100103103 91 82 82 88 94100100 Wind dir SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW SW Wind spd 13 11 11 11 14 17 18 17 14 12 10 9 11 14 14 13 12 10 9 8 Clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 30 30 40 40 40 QPF 12hr 0.36 0.19 0.30 0.21 0.25 Rain shwrs 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 Heat index 98 93 85 96104103 99 94 86 93 98 97 94 90 84 Max heat 99 91 96 104 102 92 93 98 96 89 High Surf Y Y Y Y Y Y Y Date 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 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 78 82 78 84 78 85 79 87 Temp 82 85 81 78 80 82 80 79 82 84 81 78 82 84 81 79 84 86 Dewpt 78 78 79 78 78 78 79 79 78 79 79 79 79 79 79 78 79 79 PWind dir SW W W SW SW SW SW W SW Wind char GN LT LT GN GN BZ BZ GN BZ Avg clouds B1 B1 B2 B2 B2 OV OV B2 OV OV OV OV B2 B1 B1 B1 B1 B1 PoP 12hr 40 40 60 60 60 70 70 40 40 Rain shwrs C C C C L L L L L L L L L C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ001-221800- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 650 PM ChST Sat Aug 22 2026 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 77 87 78 85 77 Temp 83 80 78 77 78 83 86 86 84 82 80 78 79 82 85 84 83 80 78 77 Dewpt 79 80 80 80 80 80 80 80 80 80 80 79 79 79 79 79 79 79 79 79 RH 88100107110107 91 82 82 88 94100103100 91 82 85 88 97103107 Wind dir SW SW SW SW SW SW SW SW SW SW SW S S SW SW SW SW SW SW SW Wind spd 11 9 9 9 12 14 14 12 11 9 6 6 9 11 12 11 9 8 6 5 Clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 30 30 40 40 30 QPF 12hr 0.20 0.18 0.20 0.15 0.23 Rain shwrs C C C C S S S S C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S Heat index 95 90 94101100 97 92 86 92 97 96 93 89 Max heat 96 89 94 101 99 91 92 97 95 86 High Surf Y Y Y Y Y Y Y Date 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 84 77 83 76 84 77 83 78 83 Temp 81 83 80 77 80 82 79 77 81 84 81 78 81 83 80 78 81 83 Dewpt 78 78 78 78 78 78 79 79 79 79 79 79 79 79 79 79 79 79 PWind dir SW SW SW SW SW SW SW SW W Wind char LT LT LT LT GN GN GN GN GN Avg clouds B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 OV OV B2 B1 B1 B1 B1 B1 PoP 12hr 40 40 50 50 60 60 60 40 40 Rain shwrs C C C C C C C C L L L L L C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ002-221800- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 650 PM ChST Sat Aug 22 2026 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 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 87 78 87 79 Temp 84 81 79 77 78 83 87 87 85 83 80 79 79 83 86 86 84 82 81 79 Dewpt 79 79 80 80 80 80 80 80 80 80 80 79 79 79 79 79 79 79 79 79 RH 85 94103110107 91 80 80 85 91100100100 88 80 80 85 91 94100 Wind dir SW SW SW SW SW SW SW SW SW SW S S S S SW SW SW SW SW S Wind spd 12 10 10 10 12 16 14 12 10 8 6 6 9 10 10 9 8 5 4 4 Clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 PoP 12hr 30 30 40 40 50 QPF 12hr 0.14 0.14 0.19 0.18 0.32 Rain shwrs 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 Heat index 97 92 95102101 98 94 89 85 95100 99 97 93 89 85 Max heat 98 90 95 102 100 92 95 100 98 92 High Surf Y Y Y Y Y Y Y Date 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 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 85 78 86 78 83 78 84 Temp 83 85 81 77 82 84 81 78 82 85 81 78 81 82 80 78 82 84 Dewpt 78 78 78 78 78 78 79 79 78 79 79 79 79 79 79 79 79 79 PWind dir S SE SE S SW SW SW SW SW Wind char LT LT LT LT GN GN GN GN GN Avg clouds B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 50 50 50 50 50 50 50 50 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 $$ MPZ003-221800- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 650 PM ChST Sat Aug 22 2026 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 77 88 79 87 79 Temp 84 81 79 78 78 83 87 87 85 83 81 79 80 84 87 86 85 83 81 79 Dewpt 79 79 80 80 80 80 80 80 80 80 80 79 79 79 79 79 79 79 79 79 RH 85 94103107107 91 80 80 85 91 97100 97 85 77 80 82 88 94100 Wind dir SW SW SW SW SW SW SW SW SW SW S S S S SW SW SW SW S S Wind spd 13 11 10 10 12 16 14 12 10 6 6 6 8 10 9 9 8 5 4 3 Clouds B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 PoP 12hr 30 30 40 40 50 QPF 12hr 0.09 0.11 0.19 0.18 0.31 Rain shwrs C C C C S S S S C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S Heat index 97 92 84 95103102 99 94 90 85 86 95101100 97 93 90 85 Max heat 98 90 95 103 101 93 95 101 99 92 High Surf Y Y Y Y Y Y Y Date 08/25/26 Wed 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 86 77 85 78 86 77 83 78 85 Temp 83 85 81 78 82 85 81 78 83 85 81 78 81 83 80 78 82 84 Dewpt 78 78 78 78 78 78 79 79 78 79 79 79 79 79 79 79 79 79 PWind dir S SE SE S SW SW SW SW SW Wind char LT LT LT LT GN GN GN GN GN Avg clouds B2 B2 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 50 40 40 40 50 50 50 40 40 Rain shwrs C C C C C C C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$