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.
Cross-checked with our atlases
Union Island in our other atlases
Everything Coastya, Peakyas, Lakeyas and Cascadyas know about what lies inside Union Island, each with its own numbers.
1mountainPeakyas
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 |
| Beaches, mountains, lakes and waterfalls | Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0 |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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