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Travel Tips
the live sargassum map
Where the seaweed is right now, from NOAA satellite data · updated daily for the Caribbean and Belize
Satellites beat rumors
This page tracks floating sargassum across the Caribbean in near-real time and translates it into a beach-level risk read for Belize. The regional map shows the open-ocean signal from NOAA; the forecast below it shows what that means for Ambergris Caye, Caye Caulker, Placencia, and Hopkins this week.
Reviewed by RowanBorn in Belize, lives near San IgnacioLast reviewed August 30, 2026
Map data: NOAA CoastWatch, refreshed daily
Latest Belize NMS sargassum forecast (valid Nov 03 to Nov 10, 2026): expected beach impact is minimal at San Pedro Town, Caye Caulker, Hopkins and Placencia. Official NMS forecast
Sargassum conditions change week to week. Check Belize forecasts, NOAA/AOML reports, and local operator updates before travel, especially June through October.
Live regional conditions
Sargassum map 2026: where the seaweed is right now
Use this live sargassum seaweed map for 2026 to see the 7-day floating sargassum signal across the Caribbean before it drifts toward Belize.
- Brighter greens, yellows, and reds mean denser floating sargassum. Blues and purples mean clear open water.
- This is the regional open-ocean picture, not a beach-by-beach cleanup report. Pair it with the Belize sargassum forecast above for local beach impact.
- The barrier reef blocks much of what you see here from reaching inner-reef and lagoon swimming areas.
Sargassum map updated daily from NOAACaribbean basin
Daily coastal risk
Belize sargassum forecast 2026: daily coastal risk
This daily sargassum inundation risk forecast is clipped to the Belize coast and updated from NOAA SIR data. It estimates how likely floating sargassum is to reach the shoreline, the practical step beyond the open-ocean map.
- High
- Medium
- Warning
- Low
Coloured stretches show forecast risk along the coast and cayes, from low through high. For Belize sargassum season and Belize seaweed season planning, use this with the NMS beach forecast for town-level detail.
Open the NOAA SIR reportNOAA SIR riskBelize coast
From conditions to a better beach
Seaweed on your beach? Start with the shores that face away from it.
The forecast tells you where sargassum may land. The next guide shows the west-facing beaches, lagoon swims, reef water, and inland alternatives that stay clearer when the exposed coast is affected.
Stay smart in seaweed season
Bases where the water stays clear
Your hotel's side of the island matters more than the forecast. These bases keep a reliable swim within reach even in a heavy season.
Ambergris Caye
Secret Beach and the lagoon side face west, so the island itself blocks the seaweed.
Premium Partner
Xanadu Island Resort
Ambergris Caye, Belize (1 mile south of San Pedro Town) · $180-$975/night
Premium Partner
Villa Abrazos
San Pedro, Ambergris Caye · Contact for rates
Via Viator
Reef trips that skip the seaweed
Sargassum piles up on the shore, while the water out on the barrier reef stays clear. These are the best-reviewed snorkel trips on Viator from San Pedro, Caye Caulker and Placencia.
6 tours via Viator
Via Viator
Hol Chan Full-Day Bucket List Snorkeling and Marine Life Tour
6h 30m · From $99
4.8(1,055)
We love the natural beauty our country has to offer and want to share it in a fun-filled sustainable way. We'll take you to explore 7 epic snorkel stops; turtles, manatees, a ship wreck, sharks and rays, pristine corals at Hol Chan, the coral gardens and two sight seeing sights around Caye Caulker. After this tour you'll check so many things off of your bucket list and you'll learn so much about the Caribbean sea and we take Free GoPro photos/videos for you. Group size per boat is usually 4-10 people the most. We do not use single-use plastics on board our boats, we do not touch or feed the marine life and we hire experienced, energetic guides to bring you the best experience there is to offer. We also give back a percentage of our profits to the local community at the end of the year to support a number of community projects. ***This tour is not for cruise ship passengers, we do not meet in Belize City which makes this tour not compatible with the cruise ship time frame.***
Via Viator
Snorkeling at Hol Chan Marine Reserve and Shark Ray Alley
2h 45m · From $80
4.8(299)
Join our Team as we take you to enjoy a wonderful time in our outdoor office where we provide a detailed snorkeling Tour at two of the best sites anywhere in Belize. We do our best to extend to a 3rd snorkeling stop on our 3 hour tour. We arrive at the locations before the rush hour so you can enjoy abundance of Marine life. The "Hol Chan Marine Reserve" and "Shark & Ray Alley" are the most famous sites near Ambergris Caye & home to more than 200 species of fish, Rays, pristine coral formations along with sea turtles, rays & much more. "Shark & Ray Alley" offers a friendly but trilling experience with friendly Nurse Sharks, fishes & Southern Stingrays in their natural habitat.
Via Viator
Caye Caulker Sailing with Snorkeling Hol Chan and Shark Ray Alley
8h · From $150
4.8(266)
Snorkeling and Sailing to Caye Caulker with stops at Hol Chan Marine Reserve and Shark & Ray Alley. We do a guided snorkel of the Marine Reserve Hol Chan and then snorkeling at Shark & Ray Alley. We leave a little later than most Tour Operators at 10:00 am vs 8:00 am and return later as well, to include the sun setting, where others have you back before or around 4:00 we get back about 6:00 pm. The Crew will walk Guests around the Village in Caye Caulker, go to feed the Tarpon or see the Seahorses and check out The Split. We typically see dolphins along the way!
Via Viator
Caye Caulker Marine Reserve 3 Stops Snorkeling Adventure
3h · From $66
4.8(57)
Discover the stunning underwater world of the Belize Barrier Reef, the second largest in the world! Begin your adventure at the meeting point, where the crew welcomes you, provides quality snorkeling gear, and gives a full safety briefing. Board a high-speed boat and cruise over turquoise waters to your first stop at Shark & Ray Alley, swimming safely alongside gentle nurse sharks and southern stingrays with expert guides. Continue to South Channel to explore vibrant coral reefs filled with tropical fish, eagle rays, and other marine life. Next stop at Coral Gardens with free time to enjoy colorful coral formations, spot bright fish, take photos, and soak in the peaceful beauty of the reef. Finally, end your tour with a bonus stop at the Tarpon Feeding Dock, where you can hand-feed giant silver tarpons as they leap from the water. Private tours are available for cruise ship guests. Please select this option when booking. Minimum of 5 people per booking.
Via Viator
Snorkeling at Silk and Moho Caye
7h · From $152
4.9(215)
Dive into the ultimate underwater adventure around the stunning Silk Caye! Swim with the friendly nurse sharks, graceful sea turtles, and sleek sting rays in their natural habitat. And that's not all – you'll also get to soak up some sun on this pristine island paradise. After working up an appetite, indulge in a mouth-watering lunch lovingly cooked by your guides on the gorgeous Moho Caye. Once you've refueled, the snorkeling fun continues around the breathtaking Moho Caye. Don't miss this chance to experience the magic of Belize's aquatic wonders!
Via Viator
Snorkel and Island Experience at Laughing Bird Caye National Park
6h · From $150
4.8(115)
Laughing Bird Caye is a National Park and World Heritage Site. It is a long and narrow island known for its abundance of marine life and corals. The name comes from the gulls that are among the many birds that Inhabit the north end of the caye. Laughing Bird Caye offers excellent snorkeling as would be expected at a national park. On the east side of the island coral mounds separated by sandy patches rise to about 5 feet from the surface. These mounds have a variety of coral types which are home to lobsters, barracuda, lizardfish, angel fish, parrot fish, spotted drums, southern rays and a myriad of reef fish. On the west side your guide will find lobster, barracuda, lizardfish, Nassau grouper, angel fish, furry sea cucumbers, conch and lots and lots of colourful juvenile reef fish.
Clicking a tour opens our tour details page. Booking takes place on Viator.com. We may earn a commission at no extra cost to you. Read our affiliate disclosure
Beyond Belize
reading the map across the Caribbean
The satellite layer covers the whole basin, so the same image answers the question for any coastline. Three reads that make sense of it:
The eastern islands see it first
The belt drifts east to west, so Barbados and the eastern Caribbean meet each pulse weeks before the western Caribbean does. When the east side of the map lights up, the west has lead time to watch.
The Riviera Maya takes the direct hit
Cancun, Playa del Carmen, and Tulum sit on an exposed shoreline that faces the open Caribbean, which is why they usually take the heaviest landings in the region. A dense signal off Cozumel typically reaches those beaches within days.
Belize reads differently
Here the barrier reef and lagoon sit between the open sea and most swimming areas, so an offshore signal is a warning, not a verdict. The risk forecast above turns the same satellite data into the beach-level read.
Cross-check any read with the scientists: USF's Sargassum Watch System publishes monthly outlook bulletins for the basin, and NOAA's daily Sargassum Inundation Risk grades coastal risk from the same satellite family this page uses.
From map to plan
What the map means for your beach
Belize Sargassum Guide
The season month by month, region by region, and how travelers plan around it
Open guideBeaches Without Sargassum
The leeward shores, lagoon sides, and inner-reef spots that stay clear
Open guideBest Time to Visit
Balance sargassum season against weather, crowds, and prices
Open guideSargassum alerts
know before the seaweed does
One email a week during the season: where sargassum is landing, which coasts are staying clear, and what it means for your beach days. Built from the same NMS and NOAA data as this tracker.
Free. No spam. Unsubscribe anytime.
Questions travelers ask
Sargassum Map FAQs
Where can I see a live sargassum map for 2026?
This page. The map above is rendered from NOAA CoastWatch satellite data (the USF Alternative Floating Algae Index) and refreshes daily, showing the 7-day cumulative floating-sargassum signal across the Caribbean basin, including the waters east of Belize.
How often is the sargassum map updated?
Daily. The map is served directly from NOAA's latest published satellite field, and NOAA's own date stamp is visible on the image so you can confirm how current it is. The Belize beach-risk forecast below it updates on the same cadence.
How do I read the sargassum map?
Brighter greens, yellows, and reds mean denser floating sargassum; blues and purples mean clear open water. It shows the open-ocean picture, not beach-by-beach conditions: seaweed visible offshore can take days to arrive, drift elsewhere, or be blocked by Belize's barrier reef before it reaches swimming areas.
Does sargassum on the map mean Belize's beaches are covered?
Not necessarily. Belize's barrier reef blocks much of the floating sargassum from reaching inner-reef and lagoon swimming areas, and impact varies sharply by coast: east-facing mainland beaches get the most, leeward caye shores and lagoon sides stay clearer. Check the per-region risk forecast on this page for the beach-level picture.
When is sargassum season in Belize?
The main season runs roughly March through October, peaking June to August. Arrivals vary week to week with wind and currents, which is exactly why a live map beats a static seasonal chart. For month-by-month planning, see our full Belize sargassum guide.
Is there a live sargassum tracker for the whole Caribbean?
Yes: the satellite tracker on this page covers the entire Caribbean basin, not just Belize. NOAA's floating-algae signal spans the full belt from the eastern islands through the Yucatan, so you can check any coastline on the same image, then use the Belize risk forecast for the beach-level read here.
For bloggers and hotels
put this tracker on your site
Writing about sargassum, or answering the same guest question every week? Embed the live Belize tracker for free: the daily NOAA risk map and NMS beach forecast, always current, no maintenance on your end.
Copy the snippet, paste it into any page or post, and keep the credit line so your readers can find the full tracker.
Beyond the seaweed
Plan the rest of the trip
10-Day Belize Itinerary
San Ignacio and the cayes, with reef and jungle days planned day by day
Open guide7-Day Belize Itinerary
Three nights in San Ignacio and four on the cayes, planned day by day
Open guideBelize Trip Cost
Real daily budgets for food, hotels, tours, and transport
Open guideBest Time to Visit
Compare dry season, green season, sargassum, crowds, and value month by month
Open guideCheck the map, then book the trip
Most weeks, most of Belize's swimming water is clear, and now you can verify that yourself before you commit to a beach.