How warm is St. Lucia, St. Vincent & Grenada in December?

Typical highs are about 83°F and the sea is about 83°F. That is warm enough for long swims without a wetsuit.

Is there sargassum in St. Lucia, St. Vincent & Grenada in December?

In a typical year seaweed is low in December. It is usually lightest in May and June and heaviest in August and September. Landings vary a lot by year, wind and currents; Veabird's weekly sargassum report and each beach's page have the current forecast.

Is December hurricane season in St. Lucia, St. Vincent & Grenada?

No. Storm risk is very low in December.

How crowded is St. Lucia, St. Vincent & Grenada in December?

Typically very busy, around Christmas & holiday break. The quietest months are usually September and October.

St. Lucia, St. Vincent & Grenada in December

December is a good month for St. Lucia, St. Vincent & Grenada: a typical day grades B+, the 5th best of the 12 months. Expect highs near 83°F, water around 83°F and about a 47% chance of rain on a given day. Sargassum (seaweed) is usually low in December. Beaches are typically very busy (Christmas & holiday break).

Typical dayB+5th of 12 months

Highs / water83°FSea 83°F

Rain chance47%on a given day

SeaweedLowtypical year

CrowdsVery busyChristmas & holiday break

Storm riskVery lowoutside storm season

St. Lucia, St. Vincent & Grenada month by month

Typical grade and high for each month. Higher is better: A+ to F.

November: B+ · December: B+ · January: B+. The best months are usually April, May and October, and the weakest are July and August.

Best beaches in St. Lucia, St. Vincent & Grenada in December

Resorts with the best typical December, and their grades for the next few days.

Beach	Typical Dec	Seaweed	This week
Beaches Resort Saint Vincent	A-	Very low	SatA-SunBMonB-TueB+WedA-
Harmony Suites	A-	Low	SatBSunCMonCTueB-WedB
Hummingbird Resort	A-	Low	SatB-SunCMonCTueCWedB-
Marigot Beach Club	A-	Low	SatB-SunC+MonC+TueB-WedB
Palm Island Resort & Spa	B+	Very low	SatBSunB+MonB-TueA-WedA
Soho Beach House Canouan	B+	Very low	SatB+SunBMonBTueA-WedA
Ti Kaye Resort & Spa	B+	Low	SatB-SunCMonCTueCWedC+
Point Bay Resort	B+	Low	SatBSunC+MonC+TueBWedB+

Grades for the next few days from Veabird's beach forecast, updated Oct 3, 18:00 UTC. Higher is better: A+ to F.

Better beach options in December

Elsewhere in the Caribbean, Cuba's Cays (A-) and Varadero & Havana (A-) usually grade higher in December. Further afield: Huatulco (A), Puerto Vallarta (A) and Los Cabos (A). Every destination in December.

Questions

Is December a good time to visit St. Lucia, St. Vincent & Grenada?: December is a good month for St. Lucia, St. Vincent & Grenada: a typical day grades B+, the 5th best of the 12 months. Expect highs near 83°F, water around 83°F and about a 47% chance of rain on a given day. Sargassum (seaweed) is usually low in December. Beaches are typically very busy (Christmas & holiday break).
How warm is St. Lucia, St. Vincent & Grenada in December?: Typical highs are about 83°F and the sea is about 83°F. That is warm enough for long swims without a wetsuit.
Is there sargassum in St. Lucia, St. Vincent & Grenada in December?: In a typical year seaweed is low in December. It is usually lightest in May and June and heaviest in August and September. Landings vary a lot by year, wind and currents; Veabird's weekly sargassum report and each beach's page have the current forecast.
Is December hurricane season in St. Lucia, St. Vincent & Grenada?: No. Storm risk is very low in December.
How crowded is St. Lucia, St. Vincent & Grenada in December?: Typically very busy, around Christmas & holiday break. The quietest months are usually September and October.

Plan it

Windward Islands: this week's forecast, beach by beach
Caribbean Beach Report: this week, updated every Monday
Compare dates and beaches on the map

Typical-month numbers from Veabird's year-ahead outlook for the 66 resorts here (median resort): 6 years of ERA5 climate normals, the seasonal pattern of the Atlantic sargassum belt, holiday crowd calendars and historical storm tracks. Any given year can differ; check the 16-day forecast before you go.