Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
8.7km²
Area
26km
Coastline
93m
Highest point
5,000
People
29°C
Warmest sea
September
208km
To the mainland
When to go to Union Island
Best for the beach from January 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.
Island in the Grenadines
Union Island is an island in Saint Vincent and the Grenadines. It belongs to Grenadines. It covers 8.7 km², with 26 km of coastline. Its highest point rises to 93 m. About 5,000 people live on it. The nearest mainland is 208 km away.
Getting there
- Union Island International Airport (UNI)airport on the island, with scheduled flightsCar hire at GND airport (Saint George's)Discover Cars · Affiliate link↗
- FerriesKingstown, Saint Vincent - Clifton, Union Island, Clifton, Union Island - Mayreau, Tyrell Bay, Carriacou - Clifton, Union Island, Petit Saint Vincent - Clifton, Union Island
- 208 km from the mainlanddistance to the nearest continental coast
- From January to Aprilbest months to go (from 30 years of averages)
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 Union Island.
- 51beachesChatham Bay Beach, Kite Beach, Water Break Beach and 48 more
- 5viewpointsPoint Lookout Fort, Chatham Lookout and 3 more
- 1ferry terminalsClifton
- 3named peaksMount Taboi, Mount Olympus, Big Hill/Top Hill
- 1castles and fortsFort Basin
- 11hotels, guesthouses and apartments
- 14restaurants, cafés and bars
Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.
The shape of the land.
On average the island stands 64 m above the sea. 96 % of it is below 200 m.
- 52 %0–50 m
- 44 %50–200 m
- 4 %200–500 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.
5 km
All outlines drawn to the same scale (Natural Earth and OpenStreetMap).
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 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
| Night low (°C) | 26 | 26 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 |
| Sea (°C) | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
| Rain (mm) | 44 | 22 | 28 | 28 | 59 | 99 | 114 | 123 | 114 | 142 | 131 | 72 |
| Wet days | 11 | 6 | 7 | 8 | 14 | 21 | 23 | 25 | 23 | 25 | 22 | 16 |
| Sun h/day | 8.2 | 8.8 | 9.0 | 8.8 | 8.6 | 7.6 | 8.1 | 8.4 | 8.3 | 7.6 | 7.5 | 7.9 |
| Wind (km/h) | 28 | 28 | 27 | 26 | 26 | 28 | 26 | 22 | 20 | 21 | 24 | 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 | +0.5 | +0.6 | +0.7 | +0.4 | +0.4 | +0.6 | +0.8 | +0.5 | +0.7 | +0.4 | ±0.0 | +0.4 |
| 2021 | +0.3 | +0.4 | −0.1 | +0.1 | +0.1 | +0.2 | +0.2 | +0.3 | +0.7 | +0.4 | +0.1 | +0.3 |
| 2022 | +0.1 | +0.4 | +0.3 | +0.2 | ±0.0 | +0.1 | +0.2 | +0.2 | +0.3 | ±0.0 | −0.2 | −0.3 |
| 2023 | −0.1 | −0.2 | +0.1 | +0.1 | +0.3 | +0.9 | +1.1 | +1.0 | +1.0 | +1.2 | +0.8 | +0.8 |
| 2024 | +0.9 | +1.1 | +1.2 | +1.3 | +1.3 | +1.3 | +1.2 | +1.4 | +1.3 | +1.5 | +1.3 | +1.0 |
| 2025 | +1.0 | +0.8 | +0.7 | +0.5 | +0.6 | +0.2 | +0.5 | +0.7 | +0.6 | +0.7 | +0.3 | +0.2 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Nearby
More islands nearby.
Grenada
Grenada314 km²840 m59 km away
Carriacou IslandGrenada32 km²291 m15 km away
Canouan
Saint Vincent and the Grenadines7.7 km²4 m17 km away
Petite MartiniqueGrenada2.0 km²209 m11 km away
BequiaSaint Vincent and the Grenadines16 km²148 m51 km away
MustiqueSaint Vincent and the Grenadines5.6 km²32 m40 km away
Saint VincentSaint Vincent and the Grenadines346 km²1,220 m77 km away
Saint Lucia
Saint Lucia640 km²866 m150 km awayAbout these numbers
| Names, area, population | Wikidata (Q536311) · CC0 |
|---|---|
| Outline | © OpenStreetMap contributors · ODbL |
| 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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