Barmouth 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 05:00 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 Europe/London local. Folk tradition, not a scientific forecast.

Next spring tide on Mon 18 May (range 4.7m / 15.4ft). Last neap on Sat 16 May. 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.

Barmouth sits on the southern edge of Cardigan Bay where the Mawddach Estuary meets Cardigan Bay. The Barmouth Bridge — a 800-metre viaduct carrying the Cambrian Coast Railway across the estuary mouth — is a visual anchor for the town and one of the longest timber rail viaducts in Wales. The Cadair Idris mountain rises directly behind the town, and on clear days the view from the beach is mountain-to-sea with nothing in between. Mean spring tidal range is around 3.5 metres; the estuary geometry amplifies this in the upper reaches. The beach is 5 kilometres of sand running south from the town along the Morfa Dyffryn dunes. It's exposed and faces west into Cardigan Bay, which generates Atlantic swell from southwesterly and westerly storms. Surf at Barmouth is inconsistent but genuine — 2 to 4 foot beach break in autumn and winter on westerly swells. The town beach in front of the promenade is flatter and less powerful than the dune section south of the fairground. The Mawddach Estuary is the second most important feature. The estuary trail (11 km from Barmouth to Dolgellau) runs along the southern bank and is one of the more scenic flat walks in Wales. The rail viaduct walk connects north and south banks for pedestrians and cyclists. On an incoming tide the estuary channels fill with brackish water and the mudflats come alive with wading birds — dunlin, redshank, curlew, and oystercatcher work the exposed mud ahead of the flood. Fishing in the estuary yields sea trout (sewin, in Welsh fishing culture) from June through September. Sewin are a prized species in Wales — larger than the river-run fish and highly prized among fly fishermen who wade the estuary channels on the lower tide. The Mawddach is considered one of the better Welsh sewin rivers; a local permit is required and available from tackle shops in Barmouth. Cycling the Cambrian Coast and the Mawddach Trail is popular; the Sustrans network connects Barmouth to Harlech north and Aberystwyth south. The single-track Cambrian Coast railway provides a scenic alternative to driving for day visitors from Wrexham or Shrewsbury. Tide predictions on this page come from Open-Meteo Marine, a gridded global ocean model, cross-referenced with UK Environment Agency gauge data. For the most accurate local predictions, consult the UK National Tide Gauge Network via CEFAS or the UKHO's EasyTide service.