Marshall IslandsIn numbers
8.0km²
Area
3m
Highest point
29°C
Warmest sea
September
3,593km
To the mainland
When to go to Rongelap Atoll
Best for the beach from December to April.
The sea is warmest in September (29 °C) and coolest in February (27 °C). You can swim comfortably all year (21 °C or more).
Averages 1991–2020. Sea: NOAA OISST, the water within 35 km of the coast. Air, rain and sun: NASA POWER. Best months weigh warm afternoons (23–30 °C), sea of 24 °C or more and few wet days.
Atoll
Rongelap Atoll is an atoll in Marshall Islands. It covers 8.0 km². Its highest point rises to 3 m. The nearest mainland is 3,593 km away.
Getting there
- Bucholz Army Air Field (KWA)nearest airport with scheduled flights · 307 km in a straight line
- 3,593 km from the mainlanddistance to the nearest continental coast
- From December to Aprilbest months to go (from 30 years of averages)
Plan the trip
Ferries, stays and things to do
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Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 28 |
| Night low (°C) | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Sea (°C) | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 |
| Rain (mm) | 24 | 24 | 36 | 59 | 61 | 62 | 105 | 134 | 139 | 161 | 116 | 43 |
| Wet days | 6 | 6 | 10 | 12 | 14 | 16 | 22 | 24 | 25 | 25 | 19 | 10 |
| Sun h/day | 8.5 | 8.9 | 9.2 | 9.0 | 9.1 | 9.0 | 8.2 | 7.9 | 7.5 | 7.0 | 7.5 | 8.2 |
| Wind (km/h) | 30 | 30 | 29 | 29 | 26 | 26 | 23 | 19 | 18 | 20 | 26 | 30 |
Averages 1991–2020 for the ~55 km NASA POWER cell over the island; the sea from NOAA OISST.
Recent years
Warmer and cooler years at sea.
Each month's sea temperature compared with its 1991–2020 average, in degrees.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | +0.6 | +0.6 | +0.6 | +0.4 | +0.1 | +0.3 | +0.6 | +0.4 | +0.2 | +0.2 | +0.3 | ±0.0 |
| 2021 | +0.1 | +0.2 | +0.1 | +0.5 | +0.5 | +0.4 | +0.4 | +0.3 | +0.4 | +0.6 | +0.2 | +0.1 |
| 2022 | +0.2 | +0.3 | +0.1 | ±0.0 | ±0.0 | ±0.0 | ±0.0 | −0.1 | +0.1 | +0.1 | +0.4 | +0.4 |
| 2023 | +0.6 | +0.5 | +0.4 | +0.1 | +0.2 | +0.3 | +0.5 | +0.4 | +0.6 | +0.5 | +0.4 | +0.4 |
| 2024 | +0.6 | +0.4 | +0.3 | +0.4 | +0.3 | +0.8 | +0.6 | +0.4 | +0.6 | +0.5 | +0.7 | +0.6 |
| 2025 | +0.6 | +0.6 | +0.4 | +0.4 | +0.3 | +0.6 | +0.3 | +0.1 | +0.3 | ±0.0 | +0.1 | +0.1 |
+1 warmer than usual −1 cooler than usual
About these numbers
| Names, area, population | Wikidata (Q542619) · CC0 |
|---|---|
| Outline | Natural Earth · public domain |
| Sea temperature | NOAA OISST v2.1 · 1991–2020 |
| Climate | NASA POWER · 1991–2020 |
| Relief, 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Beaches, ports, lighthouses, trails | © OpenStreetMap contributors · ODbL |
| Towns | GeoNames · CC BY 4.0 |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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