Cook Islands · South Pacific
Rarotonga
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.
68°F
72°F
75°F
79°F
82°F
86°F
90°F
January
80.9°F(79°F–83°F)
February
81.9°F(80°F–83°F)
March
82.1°F(80°F–83°F)
April
81.3°F(79°F–83°F)
May
79.6°F(78°F–81°F)
June
77.8°F(76°F–79°F)
July
76.4°F(75°F–78°F)
August
75.8°F(74°F–77°F)
September
75.9°F(74°F–77°F)
October
76.4°F(75°F–78°F)
November
77.8°F(76°F–80°F)
December
79.5°F(78°F–81°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 | 7979.4 | 8080.0 | 8079.6 | 7979.3 | 7877.7 | 7676.1 | 7574.6 | 7474.4 | 7474.4 | 7575.1 | 7675.7 | 7878.2 |
| AvgAvg °F | 8180.9 | 8281.9 | 8282.1 | 8181.3 | 8079.6 | 7877.8 | 7676.4 | 7675.8 | 7675.9 | 7676.4 | 7877.8 | 8079.5 |
| MaxMax °F | 8382.6 | 8383.3 | 8383.4 | 8382.7 | 8180.8 | 7979.4 | 7878.2 | 7777.2 | 7777.1 | 7878.1 | 8080.0 | 8181.4 |
Warmest in March (82.1°F). Coldest in August (75.8°F). Comfortable for swimming year-round.
About Rarotonga
The South Pacific's Cook Islands centre on Rarotonga, a 67 km² volcanic island ringed by a near-continuous fringing reef and crowned by Te Manga, a 652-metre jagged spire over the dramatic interior. Muri Beach scatters four small motus off the southeast coast, wadeable at low tide, while Titikaveka Beach on the south shore guards the calmest lagoon and richest snorkelling. Sea temperatures sit between 25 and 28 °C year-round, peaking at 27–28 °C in February and March; the airport lies under 25 minutes from any point.