Samoa · South Pacific
Upolu
Sea
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Air
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UV
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More like this
Climate · monthly averages
Sea temperature by month
30-year averages (1996–2025). Min/Max are typical daily lows and highs, not record extremes.
75°F
79°F
82°F
86°F
90°F
January
84.3°F(83°F–85°F)
February
84.5°F(83°F–85°F)
March
84.7°F(84°F–86°F)
April
84.8°F(84°F–86°F)
May
84.2°F(83°F–85°F)
June
83.3°F(82°F–84°F)
July
82.3°F(81°F–83°F)
August
81.9°F(81°F–83°F)
September
82.0°F(81°F–83°F)
October
82.6°F(82°F–83°F)
November
83.4°F(83°F–84°F)
December
84.0°F(83°F–85°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 | 8383.2 | 8383.1 | 8483.8 | 8483.7 | 8383.5 | 8281.9 | 8181.0 | 8180.9 | 8181.1 | 8281.6 | 8382.7 | 8382.8 |
| AvgAvg °F | 8484.3 | 8484.5 | 8584.7 | 8584.8 | 8484.2 | 8383.3 | 8282.3 | 8281.9 | 8282.0 | 8382.6 | 8383.4 | 8484.0 |
| MaxMax °F | 8585.4 | 8585.4 | 8685.8 | 8685.8 | 8585.2 | 8484.2 | 8383.3 | 8382.8 | 8382.7 | 8383.3 | 8484.5 | 8585.2 |
Warmest in April (84.8°F). Coldest in August (81.9°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.