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Satellite view of Portsmouth Point; the pin marks the beach
Satellite view: Sentinel-2 cloudless · EOX, CC BY 4.0, colour-adjusted by Coastya. About 6 km of coast; the pin marks the beach.

Cape

Portsmouth Point

United States Minor Outlying IslandsPalmyra Atoll · United States Minor Outlying Islands · Pacific Ocean

5.8847, -162.0492

  • 29°Sea · September
  • 28°High · October
  • 6.5 hSunshine · February

Your month at the beach

Portsmouth Point in October

  • 28°CAir, daytime high27°C at night
  • 29°CSea temperature
  • 6.1 hSunshine a day
  • 24 daysRainy days in the month217 mm in total
  • 17 km/hAverage wind

Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.

The beach itself

No reliable information yet on: bathing water quality, wheelchair access, lifeguards.

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October from 2020 to 2025

In October 2025 the sea averaged 28.9 °C — about the same as the 1991–2020 average.

Sea temperature 2025: ±0.0 °C

1991–2020 average: 28.9 °C

Air, daytime high 2025: ±0.0 °C

1991–2020 average: 28.1 °C

Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.

When to go

1991–2020 averages
Warmest seaSeptember and October29 °C
Most sunshineMarch and August6 h of sun a day
Least rainJanuary and February132 mm in the month

The year at a glance

  1. Jan28°6 h164 mm
  2. Feb28°6 h132 mm
  3. Mar28°6 h188 mm
  4. Apr28°6 h213 mm
  5. May28°6 h248 mm
  6. Jun28°6 h280 mm
  7. Jul29°6 h244 mm
  8. Aug29°6 h220 mm
  9. Sep29°6 h184 mm
  10. Oct29°6 h217 mm
  11. Nov29°5 h238 mm
  12. Dec28°5 h245 mm
8°C20°C32°C

Each card is a month. The colour is the sea temperature, on the same scale as the map; in bold, the two best months for each.

Sea temperature

1991–2020 averages
28°28°29°JanFebMarAprMayJunJulAugSepOctNovDecJan: 28°Feb: 28°Mar: 28°Apr: 28°May: 28°Jun: 28°Jul: 29°Aug: 29°Sep: 29°Oct: 29°Nov: 29°Dec: 28°28°29°
8°C20°C32°C

Climate through the year

1991–2020 averages
27°28°28°JanFebMarAprMayJunJulAugSepOctNovDecJan: 27 °C (High 28° / Low 27°)Feb: 27 °C (High 27° / Low 27°)Mar: 27 °C (High 28° / Low 27°)Apr: 28 °C (High 28° / Low 27°)May: 28 °C (High 28° / Low 27°)Jun: 28 °C (High 28° / Low 27°)Jul: 28 °C (High 28° / Low 27°)Aug: 28 °C (High 28° / Low 27°)Sep: 28 °C (High 28° / Low 27°)Oct: 28 °C (High 28° / Low 27°)Nov: 28 °C (High 28° / Low 27°)Dec: 28 °C (High 28° / Low 27°)28°27°
AverageLow – High
8°C20°C32°C

Rain

0 mm100 mm200 mm300 mmJanFebMarAprMayJunJulAugSepOctNovDecJan: 164 mmFeb: 132 mm132Mar: 188 mmApr: 213 mmMay: 248 mmJun: 280 mm280Jul: 244 mmAug: 220 mmSep: 184 mmOct: 217 mmNov: 238 mmDec: 245 mm

Sunshine

0 h2 h4 h6 hJanFebMarAprMayJunJulAugSepOctNovDecJan: 6.2 hFeb: 6.5 h6.5Mar: 6.5 h6.5Apr: 6.4 hMay: 6.4 hJun: 6.4 hJul: 6.4 hAug: 6.5 h6.5Sep: 6.3 hOct: 6.1 hNov: 5.2 h5.2Dec: 5.3 h

Sunshine hours are estimated from measured solar radiation, not observed directly.

Month by month

1991–2020 averages

Every month at Portsmouth Point: air, sea, rain and sunshine. Averages for 1991–2020.

Every month at Portsmouth Point: air, sea, rain and sunshine. Averages for 1991–2020.
MonthHigh°CLow°CSea°CRainmmRainy daysdaysSunshineh/dayWindkm/h
January282728164226.228
February272728132216.528
March282728188246.529
April282728213246.429
May282728248266.425
June282728280266.422
July282729244276.419
August282729220266.518
Septemberwarmest sea282729184226.317
October282729217246.117
November282729238245.220
December282728245245.325

Swipe sideways to see the other columns.

Plan your trip

Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.

About these numbers

Averages are for 1991–2020; the recent years (2020–2025) are what actually happened. Neither is today's weather.

WhatWhere it comes from Nearest measurement
Air, rain and sunshineNASA POWER23 km away
Sea temperatureNOAA OISST v2.1, 1991–20208 km away
2020–2025, month by monthNASA POWER · NOAA OISST v2.123 km away
Lifeguards and places to stayOpenStreetMapwithin 1–5 km
Image at the topSentinel-2 cloudless (EOX)at this spot

See every data source →