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Isla de Mona

55.5 km² of land in the Caribbean Sea.

When to go

Isla de Mona seen from space, cut out from the sea (Sentinel-2)
N 2 km

Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.

In numbers

55.5km²

Area

33km

Coastline

95m

Highest point

1

People

29°C

Warmest sea

September

684km

To the mainland

When to go to Isla de Mona

Best for the beach from December to April.

The sea is warmest in September (29 °C) and coolest in February (26 °C). You can swim comfortably all year (21 °C or more).

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.

Island of Mayagüez, Puerto Rico

Isla de Mona is an island in United States. It covers 55.5 km², with 33 km of coastline. Its highest point rises to 95 m. About 1 people live on it. The nearest mainland is 684 km away.

Read more on Wikipedia

Getting there

Plan the trip

Ferries, stays and things to do

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.

On the island

What you find on Isla de Mona.

  • 8beachesSardinera Beach, Playa Brava, Playa Uvero and 5 more
  • 1lighthousesRuinas Faro de Isla de Mona

Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.

Cross-checked with our atlases

Isla de Mona in our other atlases

Everything Coastya, Peakyas, Lakeyas and Cascadyas know about what lies inside Isla de Mona, each with its own numbers.

  • 4beaches and covesCoastya
  • Beach with the warmest sea

    29.1°C

    Playa Brava

    sea in the warmest month · according to Coastya

4 beaches

on Coastya, the beach atlas

  1. Playa Brava29.1°C
  2. Playa Sardinera29.1°C
  3. Playa Uvero29.1°C
  4. Playa del Uvero29.1°C

Open Coastya ↗

The shape of the land.

On average the island stands 55 m above the sea. 100 % of it is below 200 m.

  • 35 %0–50 m
  • 65 %50–200 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).

Size, for real

Next to islands you may know.

Isla de Mona55 km²
Santorini76 km²
Manhattan54 km²

5 km

All outlines drawn to the same scale (Natural Earth and OpenStreetMap).

Month by month

The weather on the island.

JanFebMarAprMayJunJulAugSepOctNovDec
Afternoon high (°C)262626272828292929292827
Night low (°C)262525262728282828282726
Sea (°C)272626272828282929292828
Rain (mm)362626467856668280849149
Wet days107691413171818181611
Sun h/day7.58.28.48.67.98.28.68.37.77.27.07.3
Wind (km/h)222221192020212017181922

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.

JanFebMarAprMayJunJulAugSepOctNovDec
2020+0.7+0.7+0.6+0.8+0.7+0.4+0.8+0.5+0.6+0.4+0.3+0.5
2021+0.5+0.5+0.2+0.2+0.1−0.1+0.1+0.1+0.4+0.6+0.5+0.5
2022+0.5+0.6+0.5+0.2±0.0+0.1+0.2+0.3+0.1+0.2−0.1−0.2
2023+0.1±0.0±0.0+0.3+0.7+0.8+0.8+0.8+1.0+1.3+0.7+0.6
2024+0.7+0.5+0.8+1.0+1.5+1.4+1.2+1.0+1.1+1.4+1.2+1.3
2025+1.2+1.0+1.0+0.8+0.7±0.0+0.3+0.7+0.7+0.7+0.5+0.7

+1 warmer than usual −1 cooler than usual

Photos

Seen by visitors.

Isla de Mona, Puerto Rico
R Torres · CC BY 2.0
Cueva Diamante, Isla Mona, Puerto Rico
Felix Lopez · CC BY 2.0
Looking out from Cueva del Diamante, Isla de Mona, Puerto Rico
Felix Lopez · CC BY 2.0
Mona Island cave no.3
Serge Aucoin · CC BY-SA 4.0

About these numbers

Names, area, populationWikidata (Q94899) · CC0
Outline© OpenStreetMap contributors · ODbL
Sea temperatureNOAA OISST v2.1 · 1991–2020
ClimateNASA POWER · 1991–2020
Relief, 3D modelCopernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA
Beaches, ports, lighthouses, trails© OpenStreetMap contributors · ODbL
TownsGeoNames · CC BY 4.0
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons
Beaches, mountains, lakes and waterfallsCoastya — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; NOAA OISST

Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.

The family

Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?

Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.You are here
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.Visit canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Visit