Cancun Seaweed Map 2026 — Live Sargassum, Beach by Beach
Updated June 30, 2026 from Copernicus satellite data — refreshed 4× per day.
The Cancun seaweed map for 2026 is a live, interactive map showing the sargassum on every beach from Holbox to Mahahual right now — each one rated clean, moderate, or avoid, with a 0–100 Beach Score and a 7-day forecast. It is updated four times a day from Copernicus and NOAA satellite imagery, so what you see is today's water, not last season's average. That is the difference. Most "2026 sargassum maps" hand you one verdict for all of Quintana Roo, built from imagery that is already days old. This one reads each beach separately, pixel by pixel offshore — because the same mat that buries Playa Delfines can slide right past Puerto Morelos. We are honest about uncertainty: every beach shows the exact time of its last update and a confidence level, and the forecast is sharpest on days 1–3. Tap your beach, check its status today, and go.
Which Cancun & Riviera Maya beaches are clean in 2026?
The map ranks every tracked beach cleanest-first, but the geography rarely lies: the beaches that don't face east take the least sargassum. Playa Norte on Isla Mujeres, Holbox at the top of the peninsula, and Cozumel's leeward west coast (Palancar) stay clear even at peak — their orientation does the work. Along the open Cancun–Tulum corridor, a bay or reef helps: Akumal and Puerto Morelos pile up far less than exposed stretches like Playa Delfines, Playa del Carmen and Tulum's beach-club strip. But a rule of thumb is not today's reading. An overnight wind shift can clear Cancun and load Tulum by noon, so check each beach's status today on the live map before you pack the cooler — the Beach Score next to each name tells you which water is genuinely turquoise this morning.
When does the seaweed clear, and is it dangerous?
Sargassum season runs April through September, peaking May to July; November through March the coast is usually clean for weeks at a stretch. On any single beach, fresh seaweed decays once no new mats arrive — a stretch buried Tuesday can be raked clear by Friday, especially where hotels run daily cleaning and offshore barriers. Fresh sargassum on the sand is not dangerous. The problem is rotting piles: as they break down they release hydrogen sulfide (H2S), the rotten-egg smell, which can irritate eyes and lungs. Avoid old brown windrows, keep small children and anyone with asthma clear of them, and favor beaches that were cleaned that morning. Our 7-day per-beach forecast flags incoming pulses so you can time a clean window instead of guessing.
How the 2026 map is measured — not guessed
Detection starts from the AFAI (Alternative Floating Algae Index), the same spectral signature NOAA and Copernicus satellites use to spot floating sargassum from orbit. We sample it directly offshore of each beach — not a regional average — four times a day, then project each detected mat forward using wind and surface-current data, since sargassum drifts at roughly 2.5% of wind speed plus the local current. Seaweed already on the sand decays by exponential persistence unless fresh material lands. Reports from people standing on the beach correct the satellite when clouds get in the way. We backtest the forecast against what satellites later observed and publish the accuracy openly: days 1–3 verify best, days 4–7 show the trend, and we say so on every page. The data is never hand-edited or filtered for resorts.
Where to go instead on a bad day — and how to get alerts
The Mexican Caribbean gives you escape routes the moment your beach goes brown. If the Cancun hotel zone wakes up bad, Playa Norte on Isla Mujeres is usually clean — a short ferry away. From Playa del Carmen, the Cozumel ferry puts you half an hour from Palancar on the seaweed-free west coast. Holbox, up in Gulf waters, barely sees sargassum at all. Inland, a cenote or the ruins make an easy plan B for the heavy days. You can read the live map free every morning. If you'd rather not refresh it yourself, the one-time PASS (USD 5.99 / 11.99 / 19.99, no subscription) adds push alerts the moment your beach changes status, a daily clean-beach recommendation, and a morning brief — so the Watcher tells you where the water is clean before you're even awake.
Frequently asked questions
Where is the live Cancun sargassum map for 2026?
Right here. This page is the live Cancun seaweed map for 2026: an interactive, color-coded view of every beach from Holbox to Mahahual, updated four times a day from Copernicus and NOAA satellite imagery. Tap any beach for its status today, a 0–100 Beach Score and a 7-day forecast. It changes when the sea changes — check it the morning you go.
How often is the seaweed map updated?
Four times a day. Each satellite pass refreshes the AFAI reading offshore of every tracked beach, and the 7-day forecast is recalculated daily with the newest data. Every beach displays the exact time of its last update and a confidence level, so you always know how fresh the reading you're looking at really is — no stale averages, no guessing.
Will there be a lot of sargassum in Cancun in 2026?
The Atlantic belt is large again, so expect a real season April–September, heaviest May–July, with November–March mostly clean. But volume on any single beach swings daily with wind and current. Rather than predict the whole year, we track each beach live and forecast seven days out — check your beach's status today on the map above.
Is the seaweed in Cancun dangerous?
Fresh sargassum on the sand is harmless. The risk is rotting piles, which release hydrogen sulfide (H2S) — the rotten-egg smell — that can irritate eyes and airways. Avoid old brown windrows, keep children and asthmatics clear, and pick beaches cleaned that morning. The map flags avoid-status beaches so you can steer toward clean, freshly-raked sand.
Which Riviera Maya beaches have the least sargassum in 2026?
The ones not facing east: Playa Norte on Isla Mujeres, Holbox, and Cozumel's west coast (Palancar) almost never get sargassum. In the Cancun–Tulum corridor, sheltered Akumal and Puerto Morelos pile up far less than open beaches. The live map ranks them cleanest-first each day, so you can confirm which are seaweed-free right now.
Does this map cover Playa del Carmen and Tulum too?
Yes. The Cancun seaweed map covers the whole Riviera Maya — Cancun, Puerto Morelos, Playa del Carmen, Akumal, Xpu-Ha, Tulum, Cozumel, Isla Mujeres, Holbox and Mahahual — each beach tracked separately. Tulum and Playa del Carmen face east and take more sargassum, so a per-beach reading matters most there. Tap either on the map for its status today.
Live Seaweed & Sargassum Map — Cancún and the Riviera Maya · Sargassum Forecast for Cancún & the Riviera Maya — Next 7 Days · Beaches Without Sargassum Today in Cancún & the Riviera Maya · Sargassum Season in Cancún & the Riviera Maya — 2026 Guide · Best beaches without sargassum · Sargassum this week · Methodology & accuracy · Press & media · Cancún Seaweed Today — Live Satellite Sargassum · Tulum Sargassum Today — Live Beach Status by · Live map
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