Ambergris Caye and San Pedro in April: Warm Sea, Hol Chan Reef and Bacalar Chico

In April, the first boats leave the San Pedro shoreline while the light is still pale, and by the time the sun clears the water the piers are already warm underfoot. Fishermen unload their catch, snorkelers pull on masks, and the sand streets smell of coffee and fry jacks. The sea has been warming for weeks, the days are growing longer, and April on Ambergris Caye is a month built around the reef, the water and slow evenings in town.

A pier on Ambergris Caye in spring · Illustration

What is the weather like in Ambergris Caye and San Pedro in April?

April is warm, bright and sea-centered, with water that invites you in and daylight that stretches well into the evening.

Month	Sea at Ambergris Caye and San Pedro (°F)	Daylight on the 15th (hours and minutes)
March	81.6	12 h 05 min
April	82.6	12 h 36 min
May	84.7	13 h 01 min

In Belize City, April highs reach the high 80s, nights stay in the mid-70s, and only a few days bring measurable rain. That is the air picture for the region, and on the island it translates into light clothes, a hat and a steady habit of reaching for the water.

The sea is the better guide to the month. It has climbed a degree or so since March and is a step away from the May warmth, so a swim feels refreshing rather than a shock. Time in the water, whether on a reef outing or just off a pier, becomes the natural way to spend the hottest part of the day.

The light is generous, with about twelve and a half hours of daylight in the middle of the month. That gives you a full morning on the reef and still leaves a long golden evening for a walk along the shore or a table facing the water. Sunsets arrive a little later than they did a month earlier, which suits a slow dinner.

Can you swim in Ambergris Caye and San Pedro in April?

Yes, the sea is warm enough in April for a long, unhurried swim, with water in the low 80s.

Hol Chan Marine Reserve lies south of Ambergris Caye and is described as a snorkeler’s dream, alive with schools of fish. Its shallow waters make it a place for snorkeling and for novice divers. From San Pedro the barrier reef is a 20 minute boat ride away.

Bacalar Chico National Park and Marine Reserve protects a large stretch of the northern part of the island and its waters, and it belongs to the Belize Barrier Reef System UNESCO World Heritage Site. Farther out, the reef system includes three atolls: Turneffe Atoll, Glover’s Reef and Lighthouse Reef, where the Great Blue Hole sits. Divers know that last name well.

What to do in Ambergris Caye and San Pedro in April

April here is about getting on the water and then coming back to a small town that runs on island time. The mornings belong to boats, and the evenings to the streets of San Pedro, where small restaurants set tables out and the day’s catch decides the menu. Fish, conch and ceviche sit beside rice and beans and the usual fry jacks at breakfast.

Hol Chan Marine Reserve and the reef

Hol Chan is the reef outing most travelers book first, and April’s warm sea makes it a pleasure. You slip over the side of a boat into shallow water and drift above coral heads and schools of fish, with the reserve’s protected status doing the work of keeping the reef lively. It suits snorkelers and novice divers alike.

From San Pedro the barrier reef is a 20 minute boat ride, which means you spend your time in the water instead of on a long transfer. Bring your own mask if you have one that fits well, and wear a rash guard or a light shirt over your suit so the sun does not catch your back while you float face down.

Bacalar Chico National Park and Marine Reserve

Bacalar Chico was designated as a national park and marine reserve in 1996 and covers 28,169 acres of land and sea.

It suits travelers who want the other side of Ambergris Caye, the quiet shoreline, mangrove edges and reef rather than the town. Pack water, a hat and insect repellent, and expect a day spent outdoors with the sea always nearby. April’s long daylight gives you time to take it all in.

San Pedro town on foot

San Pedro sits on the southern coast of Ambergris Caye, and it was settled in the middle of the 19th century by fishermen and their families who migrated during the Caste War of Yucatán. It became an official township in 1984. That fishing heritage still shows in the boats pulled up along the shore and in the seafood on the plate.

Walk the waterfront in the morning when the boats head out, then return at the end of the day when the light turns amber. Beach bars, small shops selling local crafts and open-air restaurants line the main streets. April’s extra daylight stretches the evening so that dinner can start while the sky is still colored.

Sargassum, a brown algae that floats in sometimes mile-long clumps and gives off a rotten egg smell when it washes onto a beach, is a feature of the Caribbean in recent years. It was first noticed in 2011, and satellite imagery in 2015 showed it blooming off the coast of Brazil and being pushed into the Caribbean by currents.

A two-day itinerary for Ambergris Caye and San Pedro in April

Day 1 is for the town and the water. Start early with a breakfast of fry jacks or eggs at a small café, then walk the waterfront while boats prepare for the day. Spend the late morning in the sea, since April’s warm water is most inviting once the sun is high. Midday suits a long lunch of fish or conch in the shade of an open-air restaurant.

In the afternoon, wander the streets for craft shops and a cold drink, then settle on a pier or a beach bar before dusk. With about twelve and a half hours of daylight, the evening light lingers, so dinner can start late. If rain turns up, a café, a gallery or a long meal indoors makes the pause pleasant.

Day 2 is for the reef. Go out in the morning to Hol Chan Marine Reserve, a 20 minute boat ride from San Pedro by way of the barrier reef, where shallow water and schools of fish reward the early start. Snorkel, float and let the day unfold at its own pace.

Back on land, a simple lunch of grilled fish and a rest in the shade fit the warmth. Later, take an unhurried walk along the shore and choose a seafood dinner for your last night. If the weather turns, that same meal can move indoors and the evening will still feel like the island.

Is Ambergris Caye and San Pedro busy in April?

April is an active month on the island, with the draw being the warm sea and the long light rather than any single event.

San Pedro is a small town, so a few boats heading to the reef at the same hour already make the waterfront feel lively. Mornings are the busiest part of the day, when outings leave for Hol Chan and the harbor fills with the sound of engines, and the town quiets as boats head out.

Evenings are mellow. Restaurants and beach bars fill gradually as the sun lowers, and the pace stays relaxed. Visitors drift between the pier, the beach and dinner without much of a rush. If you want a table with a view of the water, arrive as the light begins to soften.

The reef outings are the plans that shape a stay, so decide early which morning you want to spend at Hol Chan and which at Bacalar Chico, and let the rest of the days be loose. April also sits before the Atlantic hurricane season, which begins on June 1, and the sea has been warming steadily on the way to May.

What to pack for Ambergris Caye and San Pedro in April

Pack for sun, salt water and long days outdoors, with light clothes that dry quickly and cover your skin when the sun is high.

A swimsuit and a rash guard, for reef outings at Hol Chan and for time in the warm sea.
A mask and snorkel that fit well, since shallow reef water is the main attraction.
A wide-brimmed hat and sunscreen, because daylight lasts well into the evening.
Light, loose shirts and shorts, for the warm days you can expect in the region.
Sandals that get wet, for piers, boats and sandy streets.
Insect repellent, for a day in the park at Bacalar Chico.

Good to know before you go

The U.S. State Department rates Belize Level 2, “Exercise increased caution”, because of crime, and says the south side of Belize City has historically had the highest concentration of violent crime.

April comes before the Atlantic hurricane season, which runs from June 1 to November 30, so it sits ahead of the stretch when storms are part of the planning. Sargassum can wash onto Caribbean beaches, and when it does it smells of rotten eggs. In Belize, it is illegal to take or kill whale sharks or nurse sharks, a rule worth knowing if your reef outings bring you near them.

Ambergris Caye and San Pedro in April vs March and May

Moving the trip to March means a slightly cooler sea and a shorter day, with the water a degree or so below April’s. The light is a little shorter in the evening, so dinner by the water arrives earlier. Reef outings to Hol Chan and Bacalar Chico are the same, but the sea has not yet reached its warmer stretch.

May brings the warmest sea of the three months and the longest days, with a fuller measure of rain in Belize City. It is also closer to the start of the hurricane season on June 1. Swimmers who want the warmest water and the longest evenings will lean toward May, while those who prefer fewer rainy days lean toward April.

April sits comfortably between the two. It has water warm enough to linger in, light that lasts into the evening and a place on the calendar ahead of the storm season. For most reef-minded travelers, that balance is the reason to choose it over either neighbor.

Is April a good time to visit Ambergris Caye and San Pedro?

Yes, April is a very good month for travelers who want to spend their days on and in the water, and it suits snorkelers, divers and anyone who likes a slow evening by the sea.

It will appeal less to travelers who want a cooler climate, since the air and sea are both warm. If you prefer to avoid sargassum, which can wash up on Caribbean beaches, it is worth knowing that it is part of the picture in the region.

On arrival, head to the waterfront in San Pedro, take in the boats and the town, and decide which morning you will give to Hol Chan. Then let the days run at island speed. What is special about April here is the combination of a warming sea, long golden evenings and a reef only 20 minutes from the dock.

Sources

Open-Meteo Marine API, average 2015-2024, checked October 11, 2026
sunrise-sunset.org, sunrise and sunset calculated for the 15th of the month, checked October 11, 2026
NOAA NCEI, GHCN-Daily station BHM00078583 (Philip S. W. Goldson International Airport, Belize City), normals 1991-2020 computed from the daily record (https://www.ncei.noaa.gov/access/services/data/v1?dataset=daily-summaries&stations=BHM00078583), checked October 11, 2026
Belize Tourism Board, Sargassum resource (https://www.belizetourismboard.org/tourism-resources/sargassum-resource/), checked October 11, 2026
Belize Fisheries Department, Gladden Spit and Silk Cayes Marine Reserve (https://fisheries.gov.bz/gsscmr/), checked October 11, 2026
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Belize Fisheries Department, Bacalar Chico Marine Reserve (https://fisheries.gov.bz/bcmr/), checked October 11, 2026
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