Unawatuna, 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 09:30 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.

Next spring tide on Sun 17 May (range 0.7m). Next neap on Fri 22 May.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Unawatuna is a 600-metre bay cut into the south coast of Sri Lanka, 6 km east of Galle. The headland to the west, rising to about 30 m, blocks the dominant southwest swell from the open Indian Ocean; the rocky point at Jungle Beach wraps around the western side and the bay mouth faces southeast. Inside that arc of shelter, the water is calm enough for swimming on days when the ocean outside is breaking 2 m on the reefs. The bay is a specific piece of coastal geometry — not every beach in Southern Province has this protection, and the tides that govern it are small enough that the shelter matters far more than the tidal range. The south coast of Sri Lanka sits in the Indian Ocean's mixed semidiurnal tidal regime, but the range here is modest: mean spring range 0.5–0.8 m. Two highs and two lows per day, with the difference between high and low spring water at Unawatuna around 0.6 m. The practical effect is that the beach width changes by 20–30 m between high and low spring — significant for beach mat positioning and coral depth, but not the hundreds of metres of exposure you get on a high-tidal coast. At low spring water, the snorkelling reef 100 m from shore sits at 0.5–1.0 m depth over its shallowest heads, which is the best entry window: there is enough water to avoid contact damage but shallow enough to see the coral in detail without diving. At high spring water the same heads are at 1.1–1.6 m — still snorkellable but the bottom looks further away in the slightly deeper water. The western end of the bay shallows to knee depth at low spring, exposing a sandy patch that is ideal for children. The most-visited dive site at Unawatuna is the Tokai Maru, a Japanese anti-submarine vessel sunk during World War II. The wreck lies 30 m offshore at 28–32 m depth, resting on its side in reasonable visibility — 10–20 m on calm days, dropping to 5–8 m when the bay is stirred by southwest monsoon swells in May through August. Alongside the Tokai Maru lies a British cargo vessel, sunk in the same period; the two wrecks are treated as a combined dive site on the Galle circuit and accessible from the beach by boat in under 5 minutes. Dive operators on Unawatuna beach road run two-dive mornings departing at 08:00, with the wreck dive typically first when visibility is highest before afternoon thermal stratification sets in. Jungle Beach is 400 m west of Unawatuna Bay, accessible by a 15-minute walk over the headland via a forest path, or by swimming around the rocky point — the swim is 150 m and manageable in calm conditions, but the current around the headland picks up when wind is from the southwest. At low spring water the rocky platform at the headland base is 0.3 m shallower, making the swim-around marginally easier to judge. Jungle Beach is smaller, less developed, and more sheltered from the southeast wind than Unawatuna — it gets morning shade until 09:00. Rumassala, the forested headland that forms Unawatuna's western boundary, is a nature reserve with a claim in local legend to being the location where Hanuman dropped a fragment of the Himalayan Sanjeevani herb (referenced in the Ramayana). The forest is dense, the trees old, and the birding on the headland path is worth the 30-minute walk — bee-eaters, hornbills, and racquet-tail drongos are resident. Rocky Island at the bay mouth is visible from the beach as a low dark outline — boats circle it during whale watching transits south of Galle. The 2004 Indian Ocean tsunami struck Unawatuna directly. The bay's normally protective headland gave no defence against a tsunami: the wave height at Unawatuna was 8–10 m and the entire beach-front strip was destroyed. The rebuild took place over 2005–2010, closer to the road in some cases, though several structures were re-established on the same beach-front footprint. The bay is fully operational. What the tsunami records contribute for practical visitors today: concrete evidence that this bay's headland shelters against ordinary ocean swell, not extreme wave events. Galle Fort, 6 km west, is the reference landmark for the region. The Dutch-built fortifications from the 17th century enclose a functioning town — not a museum piece but a neighbourhood with restaurants, boutique guesthouses, a lighthouse on the southern bastion, and a cricket ground inside the walls. The fort walls, 4–5 m thick at the sea-facing bastions, absorb direct Indian Ocean swell; the interior is quiet. The walk along the ramparts at low tide gives an unobstructed view of the reef below the southern wall. Tide data for Unawatuna, 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.