Marshall IslandsAtoll

Arno Atoll

13.0 km² of land in the Pacific Ocean.

When to go

In numbers

13.0km²

Area

Highest point

2,069

People

29°C

Warmest sea

September

3,914km

To the mainland

When to go to Arno Atoll

Best for the beach from January to May.

The sea is warmest in September (29 °C) and coolest in January (28 °C). You can swim comfortably all year (21 °C or more).

28°28°28°

Jan21

28°28°28°

Feb18

28°28°28°

Mar23

28°28°28°

Apr24

29°28°28°

May26

29°28°28°

Jun26

29°28°28°

Jul29

29°28°28°

Aug29

29°29°28°

Sep28

29°29°28°

Oct28

29°29°28°

Nov27

29°29°28°

Dec24

Sea temperature (the water level) Air: night low to afternoon high Wet days Best months

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 of the Marshall Islands

Arno Atoll is an atoll in Marshall Islands. It covers 13.0 km². Its highest point rises to 3 m. About 2,069 people live on it. The nearest mainland is 3,914 km away.

Getting there

Marshall Islands International Airport (MAJ)nearest airport with scheduled flights · 47 km in a straight line
3,914 km from the mainlanddistance to the nearest continental coast
From January to Maybest months to go (from 30 years of averages)

Plan the trip

Ferries, stays and things to do

Car hire in Marshall IslandsDiscover CarsSee

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.

The shape of the land.

On average the island stands 4 m above the sea. 100 % of it is below 200 m.

100 %0–50 m

Share of the island's area in each altitude band, from the Copernicus DEM (30 m, read at 30–240 m on large islands).

Month by month

The weather on the island.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Afternoon high (°C)	28	28	28	28	28	28	28	28	29	29	29	29
Night low (°C)	28	28	28	28	28	28	28	28	28	28	28	28
Sea (°C)	28	28	28	28	29	29	29	29	29	29	29	29
Rain (mm)	161	135	167	227	218	226	255	242	262	286	274	224
Wet days	21	18	23	24	26	26	29	29	28	28	27	24
Sun h/day	6.9	7.3	7.4	7.0	7.1	7.0	7.0	7.1	6.7	6.2	5.9	6.4
Wind (km/h)	29	29	28	27	24	23	20	16	16	16	20	27

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	+0.9	+0.9	+0.6	+0.4	+0.2	+0.4	+0.3	+0.3	+0.5	+0.3	+0.4	+0.2
2021	+0.2	−0.1	+0.1	+0.1	+0.2	±0.0	±0.0	+0.3	+0.2	+0.3	+0.1	+0.2
2022	+0.4	+0.3	+0.3	−0.1	−0.2	−0.1	−0.3	−0.3	−0.2	−0.3	−0.1	±0.0
2023	+0.5	+0.2	+0.4	+0.3	+0.4	+0.5	+0.3	+0.2	+0.5	+0.3	+0.2	±0.0
2024	+0.3	+0.3	+0.5	+0.5	+0.5	+0.8	+0.6	+0.6	+0.9	+0.8	+0.6	+0.5
2025	+0.4	+0.1	+0.1	+0.1	+0.1	+0.2	±0.0	±0.0	+0.1	+0.2	±0.0	+0.2

+1 warmer than usual −1 cooler than usual

Nearby

More islands nearby.

Jaluit Atoll

Marshall Islands11 km²3 m265 km away Ailinglaplap Atoll

Marshall Islands15 km²3 m330 km away

About these numbers

Names, area, population	Wikidata (Q694057) · 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