Mirissa, Sri Lanka tide times

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 03:30 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition for major/minor fishing windows: major ≈3-hour windows around moon transit and opposition; minor ≈2-hour windows around moonrise and moonset. Times are Asia/Colombo local. Folk tradition, not a scientific forecast.

Mirissa is a 1.5 km beach bay in Matara District, 35 km east of Galle and 15 km west of Matara town on Sri Lanka's south coast. The beach curves southwest-to-northeast, backed by a coconut-palm ridge, with Parrot Rock — a small island 60 m offshore at the western end — breaking the line of the bay. To the east, the beach runs to a low headland where the bay meets the approach to Weligama. To the west, Mirissa Harbour occupies a sheltered cove behind the point, where the fishing fleet moors between trips. The tidal regime on Sri Lanka's south coast is mixed semidiurnal with a mean spring range of 0.5–0.8 m. The vertical difference between high and low spring water at Mirissa is around 0.6 m — small by global standards, which means the beach width changes modestly across the tidal cycle (15–25 m between high and low spring) and the bay's usability is driven by swell, not tide. At low spring water the western end of Mirissa Beach extends further onto the sand and the rocky headland between the beach and Weligama Bay becomes partially accessible on foot — a 200 m walk on exposed reef and rock that is entirely submerged at high spring. At the Parrot Rock end, the channel between the island and the beach shallows to 0.8–1.0 m at low spring; experienced swimmers cross to the island at all tidal states, but the crossing is easier when water depth is 1.5–2.0 m on incoming tide rather than knee-deep over sharp coral. Mirissa's defining characteristic is blue whale access. Balaenoptera musculus — the blue whale, the largest animal on Earth — feeds on the shallow shelf south of Sri Lanka from November through April. The shelf here runs south from Dondra Head lighthouse (8 km east of Mirissa, Sri Lanka's southernmost point) at depths of 100–300 m, within practical day-trip range of Mirissa Harbour. The whale watching fleet departs the harbour between 06:00 and 07:00 each morning during season — departure before 07:00 is important because the feeding zone 10–20 km offshore is reached before the afternoon southeast wind builds chop that makes whale watching difficult and uncomfortable. Return by 11:00 is standard. Blue whale encounters in Mirissa are surface-level: the whales surface to breathe every 10–15 minutes, roll their dorsal fin and flukes on deep dives, and occasionally breach. The 2–3 minute breathing cycle gives enough time to position a boat 200 m ahead of the whale's track. November through January produces the highest encounter frequency; February through April still yields encounters as the whales feed before their northward migration. Sperm whales (Physeter macrocephalus) are present year-round in the deep water south of the continental shelf break. Spinner dolphins are the most reliably seen species on any whale watching trip — they frequently bow-ride the whale watching boats on the outward journey and are visible even when whales are not encountered. Operators who claim 100% whale sighting guarantees should be treated with scepticism; a well-run boat trip in peak season has an 80–90% success rate on blue whale encounters. Parrot Rock is a small volcanic islet at the western end of Mirissa Beach, rising 4–5 m above sea level. At high spring water it is surrounded by 2–3 m of water; at low spring, the base of the rock is accessible on foot across a tidal reef. Swimmers cross the 60 m channel from the beach to the rock at all states, with the mid-incoming-tide depth of 1.5–2.0 m giving the easiest swim over the coral. The top of the rock is flat enough to stand on and gives an unobstructed view of the bay from above, including the whale watching boat departures from the harbour. Mirissa Harbour is a working fishing port. The longline fleet — medium-sized vessels, 12–18 m, targeting yellowfin tuna (Thunnus albacares) and swordfish (Xiphias gladius) — operates year-round, departing on multi-day trips. The harbour wall at low spring water exposes the stone slipway used to haul smaller vessels for maintenance. The fish market operates in the early morning when offshore boats return; the tuna and swordfish landed here supply Galle and Colombo wholesale markets. The activity on the harbour at 05:30 — boats fuelling, crews boarding, whale watching passengers gathering — is a specific window that closes by 07:30 when everyone has left. Dondra Head lighthouse, 8 km east at Sri Lanka's southernmost point, is the geographic landmark that marks the transition from the island's south coast to the east coast. The lighthouse is 50 m tall, automated, and open to visitors by arrangement. From Dondra Head on a clear day, the horizon to the south is unobstructed open Indian Ocean — the next landfall due south is Antarctica. Tide data for Mirissa, Sri Lanka comes from the Open-Meteo Marine API, a gridded model product. Timing accuracy is ±45 minutes, height accuracy ±0.3 m — usable for trip planning, not for navigation.