World Resorts USA Oahu Weather

Oahu Sea Temperature in September

Average sea water temperature in September:
+80.1°F
Minimum sea water temperature in September: 81.1°F
Maximum sea water temperature in September: 78.8°F

Daily sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 80.4°F. The highest and lowest sea temperatures during the month were 80.8°F and 79.3°F.

Monthly sea water temperature in Oahu, °F

Which USA resorts have warmest sea in September?

Place name September 2026 September 2025
Key West 87.8°F 86.9°F
Naples 87.0°F 86.1°F
Galveston 87.0°F 85.5°F
Siesta Key 86.9°F 84.9°F
Houston 86.9°F 84.9°F
Corpus Christi 86.8°F 85.8°F
Sarasota 86.8°F 84.8°F
West Palm Beach 86.6°F 86.2°F
Fort Lauderdale 86.6°F 86.4°F
New Orleans 86.4°F 84.3°F
Gulf Shores 86.1°F 84.3°F
St. Petersburg 86.1°F 84.1°F
Orange Beach 86.0°F 84.0°F
Pensacola Beach 85.9°F 83.9°F
Tampa 85.9°F 84.3°F
Clearwater Beach 85.9°F 84.0°F
Miami Beach 85.8°F 86.1°F
Panama City Beach 85.8°F 83.4°F
Pensacola 85.7°F 83.9°F
Destin 85.6°F 83.1°F

Best time for vacation in Oahu

Sunniest months:
January 8 days
September 5 days
August 5 days
Warmest months:
September 81.8 °F
August 81.8 °F
July 81.1 °F
Warmest sea temp:
October 80.1 °F
September 80.1 °F
August 79.6 °F
Coldest months:
February 74.8 °F
March 75.7 °F
January 76.0 °F
Rainiest months:
March 1 day
April 1 day
December 1 day
Windiest months:
July 12.7 mph
May 11.6 mph
June 11.3 mph

Oahu on a weather map

Oahu
+70°F
SW 7 mph
Feels like: +70°F
Precip.: 43%
Places in USA:
Name
°F
+34°F
+37°F
+70°F
+61°F
+61°F
+64°F
+63°F
+39°F
+63°F
+55°F
+61°F
+59°F
+55°F
+63°F
+37°F
24 Hours Forecast
Oahu
Local time: 20:55
November 13, friday
2100
70°F
SW
7 mph
November 14, saturday
0000
70°F
SW
9 mph
0300
70°F
SW
9 mph
0600
70°F
W
8 mph
0900
73°F
W
10 mph
1200
77°F
W
12 mph
1500
77°F
W
11 mph
1800
73°F
SW
11 mph
Units of measurement: °C / °F