Cook Islands in August

August is Cook Islands's 5th-best month (rank 5 of 12): its 3 destinations average 83/100, led by Aitutaki at 87 — 26°C and 11 rainy days — while Rarotonga trails at 81 with 104 mm of rain.

#5 of 12 months for Cook Islands · 3 destinations · updated September 2026 · climate normals from ERA5 reanalysis

Cook Islands, month by month

83/100 in August
  1. 75Jan
  2. 73Feb
  3. 77Mar
  4. 79Apr
  5. 73May
  6. 83Jun
  7. 81Jul
  8. 83Aug
  9. 86Sep
  10. 84Oct
  11. 85Nov
  12. 76Dec

Where in Cook Islands in August

#PlaceTypeFeels-like highRainComfortAt its best
1AitutakiIsland26°C60 mm · 11 days87 tier AYes
2AvaruaIsland27°C104 mm · 10 days81 tier A—
3RarotongaIsland24°C104 mm · 10 days81 tier A—

Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means August is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.

What's on in Cook Islands in August

  • Humpback whale season · Aitutaki and 2 more places · 15 Jul – 15 Oct (usually)
  • Te Maeva Nui · Aitutaki and 2 more places · 25 Jul – 4 Aug

Seasons in force

Dry season · 2 places

Peak crowds at 2 of Cook Islands's 3 well-known places this month.

Better months for Cook Islands

September · 86/100November · 85/100October · 84/100Weakest: May · 73/100
← Cook Islands in JulyCook Islands in September →Best time to visit Cook Islands, month by monthCompare: Aitutaki vs Avarua in August