Samoa · South Pacific
Upolu
Sea
80.8°F
Air
–
UV
–
Beach day
23–28°C
More like this
Climate · monthly averages
Sea temperature by month
5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
75°F
79°F
82°F
86°F
90°F
93°F
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
MinMin °F
8484.2
8484.3
8484.5
8484.4
8484.2
8383.3
8282.5
8181.4
8281.7
8282.3
8383.0
8483.9
AvgAvg °F
8584.7
8584.7
8584.9
8585.1
8584.5
8483.7
8382.8
8282.1
8282.1
8382.6
8383.4
8484.2
MaxMax °F
8585.3
8585.2
8685.9
8686.2
8585.2
8484.1
8383.0
8382.8
8382.5
8382.8
8483.8
8584.6
Warmest in April (85.1°F). Coldest in August (82.1°F). Comfortable for swimming year-round.
About Upolu
Upolu is Samoa's most populous island, a basaltic shield volcano in the South Pacific anchored by To Sua Ocean Trench, a 30-metre sinkhole reached by a wooden ladder through ferns and connected to the open sea by a tidal underwater tunnel. On the southeast corner, Lalomanu Beach faces the offshore islet of Nu'utele with palm-fringed white sand, while Saleapaga Beach in the next cove west drops to cliff edges along the lagoon. Sea temperatures hold between 26 and 28 °C year-round, with Faleolo International airport 45 minutes from Apia.