Union Island

Island Grenadines island popular for diving and yachting

Union Island in the Grenadines serves as a sailing and diving base with Clifton harbour, nearby Tobago Cays moorings, good dive sites, kite- and windsurfing and small guesthouses catering to yachtsmen.

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Union Island is a small island in the southern Grenadines that functions as a yachting and tourist hub within Saint Vincent and the Grenadines. The island is compact and known for its sheltered harbours and beaches.

Tourists use the island as a base for sailing, snorkeling and beach visits; the village of Clifton is the main arrival point with marinas and basic visitor services. Notable beaches and bays include Chatham Bay and nearby reefs that attract day trips and anchored yachts.

Union Island has long been inhabited and was integrated into the colonial and postcolonial patterns of settlement across the Grenadines, serving historically as a small fishing and inter-island trade port before tourism grew in the late 20th century.

The island lies in the Grenadines chain of Saint Vincent and the Grenadines, south of the main island of Saint Vincent and near neighbouring Grenadine islands such as Mayreau and Canouan.

  • Access: Served by a small regional airport and regular boat connections to neighbouring Grenadine islands, making it a popular base for sailing and island-hopping.

What to See #

  • Clifton Harbour: Clifton is the island's principal village and main port, providing ferry and inter-island transport links plus shops and services for visitors.
  • Chatham Bay: Chatham Bay on the island's leeward side is a well-known beach and sheltered anchorage frequented by yachts and day visitors for swimming and snorkeling.
Union Island
Union Island, Grenadines Parish, Saint Vincent and the Grenadines
12.6008, -61.4357
Ferry and airport transfers vary; expect modest domestic fares for local services

How to Get to Union Island #

Union Island (airport code UNI) has small regional flights from Saint Vincent and Grenadines and inter-island ferries from Kingstown, Saint Vincent. Private charter boats commonly call at Clifton Harbour.

Tips for Visiting Union Island #

  • Clifton is the island's main hub-book accommodation and water taxis in advance during high season.
  • Hop between nearby Grenadine islands by local boat charters; snorkeling around the island's coral gardens is excellent and less crowded than more famous sites.

Best Time to Visit Union Island #

Best reached by short regional flights into Union Island (UNI) or by ferry from St. Vincent - dry season is busiest for sailing and diving.

Dry season (peak tourism)
December-May · 24-30°C
Calmer seas and better visibility for diving and sailing; main travel season.
Wet season (quieter)
June-November · 25-31°C
Warmer with more rain and humidity; lower prices but higher risk of storms in late season.

Weather & Climate near Union Island #

Climate

Tropical climate with consistently warm temperatures year-round. Temperatures range from 23°C to 31°C. Abundant rainfall (1611 mm/year), wettest in November.

Temperature & Rainfall
Temperature Range
31°
Warmest Month
23°
Coldest Month
Monthly Conditions

January

January is warm with highs of 29°C and lows of 23°C. Regular rainfall (94 mm).

Comfort

26°
Feels Like Warm
26°C
Temperature
23° 29°

Weather

94 mm
Rainfall
5.0 m/s
Wind
Light Breeze

February

February is warm with highs of 29°C and lows of 23°C. Moderate rainfall (50 mm).

Comfort

26°
Feels Like Warm
26°C
Temperature
23° 29°

Weather

50 mm
Rainfall
5.3 m/s
Wind
Light Breeze

March

March is warm with highs of 29°C and lows of 24°C. Moderate rainfall (55 mm).

Comfort

26°
Feels Like Warm
26°C
Temperature
24° 29°

Weather

55 mm
Rainfall
5.4 m/s
Wind
Light Breeze

April

April is warm with highs of 30°C and lows of 24°C. Moderate rainfall (73 mm).

Comfort

27°
Feels Like Warm
27°C
Temperature
24° 30°

Weather

73 mm
Rainfall
5.4 m/s
Wind
Light Breeze

May

May is warm with highs of 30°C and lows of 25°C. Significant rainfall (107 mm).

Comfort

28°
Feels Like Warm
28°C
Temperature
25° 31°

Weather

107 mm
Rainfall
5.4 m/s
Wind
Light Breeze

June

June is warm with highs of 30°C and lows of 25°C. Significant rainfall (180 mm).

Comfort

28°
Feels Like Warm
28°C
Temperature
25° 30°

Weather

180 mm
Rainfall
5.5 m/s
Wind
Light Breeze

July

July is warm with highs of 30°C and lows of 25°C. Significant rainfall (167 mm).

Comfort

28°
Feels Like Warm
28°C
Temperature
25° 30°

Weather

167 mm
Rainfall
4.8 m/s
Wind
Light Breeze

August

August is warm with highs of 31°C and lows of 25°C. Significant rainfall (173 mm).

Comfort

28°
Feels Like Warm
28°C
Temperature
25° 31°

Weather

173 mm
Rainfall
4.2 m/s
Wind
Light Breeze

September

September is the hottest month with highs of 31°C and lows of 25°C. Significant rainfall (184 mm).

Comfort

28°
Feels Like Hot
28°C
Temperature
25° 31°

Weather

184 mm
Rainfall
4.0 m/s
Wind
Light Breeze

October

October is warm with highs of 31°C and lows of 25°C. Heavy rain (201 mm).

Comfort

28°
Feels Like Warm
28°C
Temperature
25° 31°

Weather

201 mm
Rainfall
4.0 m/s
Wind
Light Breeze

November

November is warm with highs of 30°C and lows of 24°C. The wettest month with heavy rain (218 mm).

Comfort

27°
Feels Like Warm
27°C
Temperature
24° 30°

Weather

218 mm
Rainfall
4.2 m/s
Wind
Light Breeze

December

December is warm with highs of 29°C and lows of 24°C. Significant rainfall (109 mm).

Comfort

27°
Feels Like Warm
27°C
Temperature
24° 29°

Weather

109 mm
Rainfall
4.6 m/s
Wind
Light Breeze

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