← All tide times

fish.logged

South West · UK tide gauge

St Marys tide times

THURSDAY 21 MAY 2026

EA gauge · St Marys

Next high tide at St Marys is at 21:00 (5.1 m, 8hr 43mins). Next low tide 15:00 (1.3 m, 2hr 43mins).

St Marys tide times today · Thu 21 May

High and low tide times at St Marys on Thursday 21 May 2026
Tide Time (UK) Height
↓ Low 03:00 1.0 m
↑ High 08:00 4.9 m
↓ Low 15:00 1.3 m
↑ High 21:00 5.1 m

Today's tide range at St Marys: 4.1 m

Current water height

3.65 m

Falling tide

As of 10:30 · 21 May (UK time)

Fishing conditions at St Marys

The best fishing window at St Marys over the next 10 days is Night Saturday 23 May, scoring 95 out of 100 from wind, tide movement, pressure and temperature.

How that 95 is reached

Baseline Every spot starts here +16
Wind W 2 mph +40
Tide 2.6 m range +16
Temperature 13°C high +20
Pressure Steady +3

Today, window by window

Night

52

00:00-06:00

Morning

73

06:00-12:00

Afternoon

59

12:00-18:00

Evening

52

18:00-24:00

UK fishing conditions map →

Best fishing times today · St Marys

Solunar feeding periods. Major periods (moon overhead and underfoot) are the strongest; minor periods fall around moonrise and moonset.

Minor period

01:08 to 02:08

Major period

04:40 to 06:40

Minor period

09:20 to 10:20

Major period

17:10 to 19:10

Tide curve · weather forecast + astronomical prediction · scroll to scrub

HARMONIC ANALYSIS YESTERDAY TODAY TOMORROW SAT 23 MAY SUN 24 MAY MON 25 MAY TUE 26 MAY WED 27 MAY THU 28 MAY FRI 29 MAY SAT 30 MAY SUN 31 MAY MON 1 JUN TUE 2 JUN WED 3 JUN THU 4 JUN FRI 5 JUN SAT 6 JUN SUN 7 JUN MON 8 JUN TUE 9 JUN WED 10 JUN THU 11 JUN FRI 12 JUN SAT 13 JUN SUN 14 JUN NOW 05:00 · 4.8m 11:30 · 1.3m 17:30 · 4.9m 23:30 · 1.2m 05:30 · 4.9m 12:00 · 1.3m 18:00 · 5.0m 00:30 · 1.2m 06:00 · 4.9m 12:30 · 1.2m 18:30 · 5.0m 00:30 · 1.1m 06:30 · 4.9m 13:00 · 1.2m 19:00 · 5.0m 01:30 · 1.1m 07:00 · 4.9m 13:30 · 1.3m 19:30 · 5.0m 02:00 · 1.2m 07:30 · 4.8m 14:00 · 1.3m 20:00 · 4.9m 02:30 · 1.3m 08:30 · 4.7m 14:30 · 1.5m 20:30 · 4.8m 03:00 · 1.4m 09:00 · 4.6m 15:30 · 1.6m 21:30 · 4.6m 04:00 · 1.6m 10:00 · 4.4m 16:30 · 1.8m 22:30 · 4.5m 05:00 · 1.7m 11:00 · 4.2m 17:30 · 1.9m 23:30 · 4.3m 06:00 · 1.8m 12:00 · 4.2m 18:30 · 1.9m 00:30 · 4.4m 07:30 · 1.7m 13:30 · 4.4m 20:00 · 1.7m 02:00 · 4.6m 08:30 · 1.5m 14:30 · 4.6m 21:00 · 1.4m 03:00 · 4.9m 09:30 · 1.2m 15:30 · 5.0m 22:00 · 1.0m 04:00 · 5.2m 10:30 · 0.9m 16:00 · 5.3m 23:00 · 0.7m 04:30 · 5.4m 11:00 · 0.7m 15:00 · 1.0m 21:00 · 5.3m 04:00 · 1.0m 09:00 · 4.9m 16:00 · 1.3m 22:00 · 5.1m 05:00 · 1.3m 10:00 · 4.6m 17:00 · 1.5m 23:00 · 4.8m 06:00 · 1.4m 11:00 · 4.3m 18:00 · 1.6m 00:00 · 4.6m 07:00 · 1.5m 13:00 · 4.3m 19:00 · 1.7m 01:00 · 4.5m 08:00 · 1.6m 14:00 · 4.3m 20:00 · 1.7m 02:00 · 4.6m 09:00 · 1.5m 15:00 · 4.5m 21:00 · 1.7m 03:00 · 4.7m 10:00 · 1.4m 16:00 · 4.6m 22:00 · 1.5m 04:00 · 4.7m 11:00 · 1.4m 16:00 · 4.8m 23:00 · 1.4m 05:00 · 4.8m 11:00 · 1.3m 17:00 · 4.9m
Past Forecast Now Astronomical (no weather)

Prediction lines are astronomical only: they extend past the weather forecast and do not include storm surge, wind or barometric effects.

Heights calibrated to the live UK Environment Agency gauge where available, otherwise relative to local chart datum.

Add this to your site →

Day-by-day breakdown

Yesterday plus the next 9 days of high and low tides, covering the full Open-Meteo tide-model horizon.

Yesterday

range 4.59 m

↓ LOW 02:00 0.74 m
↑ HIGH 07:00 5.18 m
↓ LOW 14:00 0.98 m
↑ HIGH 20:00 5.33 m

Today

range 4.12 m

↓ LOW 03:00 0.98 m
↑ HIGH 08:00 4.91 m
↓ LOW 15:00 1.27 m
↑ HIGH 21:00 5.10 m

Tomorrow

range 3.53 m

↓ LOW 04:00 1.25 m
↑ HIGH 09:00 4.62 m
↓ LOW 16:00 1.45 m
↑ HIGH 22:00 4.78 m

Saturday 23 May

range 2.94 m

↓ LOW 05:00 1.40 m
↑ HIGH 10:00 4.34 m
↓ LOW 17:00 1.60 m

Sunday 24 May

range 2.75 m

↓ LOW 06:00 1.52 m
↑ HIGH 12:00 4.27 m
↓ LOW 18:00 1.71 m

Monday 25 May

range 2.78 m

↓ LOW 07:00 1.56 m
↑ HIGH 13:00 4.34 m
↓ LOW 19:00 1.71 m

Tuesday 26 May

range 3.03 m

↑ HIGH 01:00 4.57 m
↓ LOW 08:00 1.54 m
↑ HIGH 14:00 4.49 m
↓ LOW 20:00 1.65 m

Wednesday 27 May

range 3.22 m

↑ HIGH 02:00 4.66 m
↓ LOW 09:00 1.44 m
↑ HIGH 15:00 4.59 m
↓ LOW 21:00 1.47 m

Thursday 28 May

range 3.41 m

↑ HIGH 03:00 4.73 m
↓ LOW 10:00 1.39 m
↑ HIGH 15:00 4.77 m
↓ LOW 22:00 1.36 m

Friday 29 May

range 3.57 m

↑ HIGH 04:00 4.82 m
↓ LOW 10:00 1.32 m
↑ HIGH 16:00 4.89 m

Tide data from the UK Environment Agency, refreshed at most every 30 minutes. For navigation use, always cross-check official Admiralty tables.

About tides at St Marys

St Marys sits on the South West coast and follows the standard semi-diurnal tidal pattern of the British Isles - two high tides and two low tides every 24 hours and 50 minutes, with each successive high arriving about 12 hours and 25 minutes after the last. Tide range at St Marys varies between spring tides (around new and full moon, when the Sun and Moon's gravity align for the biggest range) and neap tides (around the first and last quarter, when their forces partly cancel).

The live tide-height readings on this page come from the UK Environment Agency tide gauge network: actual sensor data, not an estimate. The 10-day forecast that follows is generated by Open-Meteo's ocean model and is calibrated each hour to the latest EA gauge reading at St Marys so the numbers match what you'd see on a printed tide table. Heights are quoted in metres above local chart datum, which is the convention used in UK Admiralty tide tables.

Whether you're sea fishing, surfing, kayaking, diving, kite-flying or just walking the dog along the beach, knowing the tide times for St Marys helps you plan around safe access, the run of the current and the productive feeding windows in either side of a tide change.

Anglers fishing the South West coast near St Marys typically cross-check the closest neighbouring gauges: Newlyn tide times (~37 miles along the coast), and Penzance tide times (~37 miles along the coast) . Calibrated heights are pulled from the live EA gauge at 49.918°N 6.317°W.

St Marys tide times: frequently asked questions

When is the next high tide at St Marys?

The next high tide at St Marys is at 21:00 on Thursday 21 May, reaching 5.1 metres. Heights are calibrated to the live UK Environment Agency tide gauge.

When is the next low tide at St Marys?

The next low tide at St Marys is at 15:00 on Thursday 21 May, dropping to 1.3 metres.

What time is high tide at St Marys today?

On Thursday 21 May 2026, 2 high tides at 08:00 (4.9m) and 21:00 (5.1m).

What time is low tide at St Marys today?

On Thursday 21 May 2026, 2 low tides at 03:00 (1.0m) and 15:00 (1.3m).

What is the tide range at St Marys?

Today's tide range at St Marys is approximately 4.1 metres between low and high water. Spring tides typically run higher and neap tides lower; see the 14-day forecast below for the pattern.

Where does the St Marys tide data come from?

Tide heights are pulled from the UK Environment Agency tide gauge network in real time, with a 14-day forecast modelled from Open-Meteo. The data is refreshed every hour and is free for anglers, surfers, kayakers and divers to use.

When are the best fishing times at St Marys today?

The major solunar feeding periods at St Marys today are 04:40 to 06:40 and 17:10 to 19:10, when the moon is overhead and underfoot. Minor periods fall around moonrise and moonset. Fish tend to feed most actively in these windows, so plan a session around them where the state of tide also suits.

Nearest tide gauges to St Marys

By great-circle distance · cross-check at your closest local gauge.

Newlyn tide times

South West · 37 mi

Penzance tide times

South West · 37 mi

Plymouth tide times

South West · 101 mi

Ilfracombe tide times

South West · 132 mi

Milford Haven tide times

Wales · 135 mi

Mumbles tide times

Wales · 153 mi

Fishing St Marys?

Log every fish you land, with conditions auto-attached.

Start logging free →