How warm is Costa Rica's Caribbean coast in March?

Typical highs are about 83°F and the sea is about 84°F. That is warm enough for long swims without a wetsuit.

Is there sargassum in Costa Rica's Caribbean coast in March?

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

Is March hurricane season in Costa Rica's Caribbean coast?

No. Storm risk is very low in March.

How crowded is Costa Rica's Caribbean coast in March?

Typically very busy, around College & school spring break and Semana Santa / Easter. The quietest months are usually September and October.

Costa Rica's Caribbean coast in March

March is one of the best months to visit Costa Rica's Caribbean coast: a typical day grades B-, the 3rd best of the 12 months. Expect highs near 83°F, water around 84°F and about a 71% chance of rain on a given day. Sargassum (seaweed) is usually low in March. Beaches are typically very busy (College & school spring break and Semana Santa / Easter).

Typical dayB-3rd of 12 months

Highs / water83°FSea 84°F

Rain chance71%on a given day

SeaweedLowtypical year

CrowdsVery busyCollege & school spring break

Storm riskVery lowoutside storm season

Costa Rica's Caribbean coast month by month

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

February: B- · March: B- · April: C+. The best months are usually January, February and March, and the weakest are August and September.

Best beaches in Costa Rica's Caribbean coast in March

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

Beach	Typical Mar	Seaweed	This week
Casa Grande Eco Lodge at Pacuare Reserve	B	Low	SatB+SunC+MonC+TueC+WedC+
Hotel Playa Bonita	B	Low	SatB+SunC+MonC+TueB-WedC+
Hotel Palace	B	Low	SatB+SunB-MonC+TueB-WedB-
Hotel Playa Westfalia	B	Low	SatB+SunBMonC+TueC+WedC+
Goddess Garden Resort	B	Low	SatB+SunBMonC+TueC+WedC+
Tortuguero Lodges (Pachira, Mawamba)	B	Low	SatCSunD+MonC+TueC-WedC-
Turtle Beach Lodge Tortuguero	B	Low	SatCSunC-MonC+TueC-WedC-
Turtle Beach Lodge	B	Low	SatCSunC-MonC+TueC-WedC-

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 March

Elsewhere in Central & South America, Panama's Pacific beaches (A-), San Andrés (B+) and Belize (B+) usually grade higher in March. Further afield: Huatulco (A), the Yucatán Gulf Coast (A) and Puerto Vallarta (A-). Every destination in March.

Questions

Is March a good time to visit Costa Rica's Caribbean coast?: March is one of the best months to visit Costa Rica's Caribbean coast: a typical day grades B-, the 3rd best of the 12 months. Expect highs near 83°F, water around 84°F and about a 71% chance of rain on a given day. Sargassum (seaweed) is usually low in March. Beaches are typically very busy (College & school spring break and Semana Santa / Easter).
How warm is Costa Rica's Caribbean coast in March?: Typical highs are about 83°F and the sea is about 84°F. That is warm enough for long swims without a wetsuit.
Is there sargassum in Costa Rica's Caribbean coast in March?: In a typical year seaweed is low in March. It is usually lightest in January and July and heaviest in September and October. Landings vary a lot by year, wind and currents; Veabird's weekly sargassum report and each beach's page have the current forecast.
Is March hurricane season in Costa Rica's Caribbean coast?: No. Storm risk is very low in March.
How crowded is Costa Rica's Caribbean coast in March?: Typically very busy, around College & school spring break and Semana Santa / Easter. The quietest months are usually September and October.

Plan it

Typical-month numbers from Veabird's year-ahead outlook for the 41 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.