Beach forecast for St Martin's
Today, Wednesday, October 28, 2026 · local time (GMT) · Isles of Scilly, United Kingdom Today, Wed, Oct 28 · GMT- Swimming
- Use care · 11 ft
- Water
- 56 °F · very cold
- Max UV
- 2 · SPF 15
- Low tide
- 12:05 pm
Today, Wednesday, October 28, it's not a beach day in St Martin's (0/10). The best day this week is Saturday, October 31, at 0/10.
Beach forecast for the next 7 days
| Day | Rating | Best hours | Swimming | Water | UV |
|---|---|---|---|---|---|
| Today | 0Not a beach day | Not today | Use care · 11 ft | 56 °F | 2 |
| Thu 29 | 0Not a beach day | No good window | Calm · 6.0 ft | 56 °F | 2 |
| Fri 30 | 0Not a beach day | No good window | Use care · 5.9 ft | 57 °F | 2 |
| Sat 31 | 0Not a beach day | No good window | Use care · 6.1 ft | 57 °F | 2 |
| Sun 1 | 0Not a beach day | No good window | Use care · 4.7 ft | 56 °F | 1 |
| Mon 2 | 0Not a beach day | No good window | Use care · 4.1 ft | 56 °F | — |
| Tue 3 | 0Not a beach day | No good window | Use care · 4.2 ft | 56 °F | — |
Each rating comes from sun, temperature, rain, wind, waves, UV, water temperature and, where there is one, the tide.
Today in detail
- Low tide at 12:05 pm: more sand
- Cloudy (98% cloud cover)
- Feels like 54 °F: chilly for the beach
- Fresh offshore wind (19 mph): it blows floats and inflatables out to sea
- Swim with care: 11 ft waves every 11 s; high rip current risk
- Water at 56 °F (very cold)
Today, hour by hour
- Swimming Use care · 11 ft
11 ft waves every 11 s: swim with care and stay where you can stand. High rip current risk. If you're caught in a rip current, don't swim against it: swim parallel to shore and wave for help. Always follow the lifeguard's flags.
- Water 56 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 2 · SPF 15
Max UV 2 (low): SPF 15 sunscreen.
- Wind 19 mph
Fresh offshore wind (19 mph): blowing sand. Skip the inflatables: offshore wind carries them out to sea.
- Tide & sand 12:05 pm
Low tide at 12:05 pm: that's when there's the most sand. High tide at 5:36 am and 5:57 pm. Coefficient 96 (spring tides): little sand left at high tide.
We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority.
Today, hour by hour
| Time | Rating | Sky | Feels like | Wind | Waves | UV |
|---|---|---|---|---|---|---|
| 8:00 am | 0 | Overcast | 50 °F | 19 mph | 11 ft | 0 |
| 9:00 am | 0 | Overcast | 51 °F | 18 mph | 10 ft | 1 |
| 10:00 am | 0 | Overcast | 51 °F | 17 mph | 10 ft | 1 |
| 11:00 am | 0 | Overcast | 52 °F | 16 mph | 9.8 ft | 1 |
| 12:00 pm | 0 | Overcast | 53 °F | 15 mph | 9.6 ft | 2 |
| 1:00 pm | 0 | Overcast | 52 °F | 15 mph | 9.3 ft | 2 |
| 2:00 pm | 0 | Overcast | 53 °F | 14 mph | 9.1 ft | 1 |
| 3:00 pm | 0 | Overcast | 53 °F | 12 mph | 8.9 ft | 1 |
| 4:00 pm | 0 | Overcast | 54 °F | 10 mph | 8.6 ft | 0 |
Beach hours only: from one hour after sunrise to half an hour before sunset.
Beaches near St Martin's
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Ganilly Bar 1.3 mi · SE
- Rushy Porth 1.5 mi · SW
- Cradle Porth 1.5 mi · W
- Cook's Porth 1.6 mi · W
- Green Porth 1.8 mi · W
- Raven Porth 1.9 mi · W
- Bathinghouse Porth 2.3 mi · SW
- Arlo Porth 3.5 mi · S
- Restrooms
- Parking
Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL).
Webcams near St Martin's
Webcams provided by windy.com — add a webcam
How we rate a beach day
We rate every beach hour from 0 to 10 with simple, fixed rules:
- Adds: sunshine (up to 3 points, fewer with more clouds), warmth (up to 4, from the feels-like temperature; ideal between 81 °F and 91 °F), a calm sea (1), water at 70 °F or warmer (1; from 64 °F, half) and low or mid tide (1: more sand). Anything without data is left out and the rest is scaled to 10.
- Takes away: cold (feels-like below 64 °F, 1 to 4 points), rain (half a point if likely, up to 6 if it rains; thunderstorms, 8), wind from force 4, about 12 mph (1 to 6 points; half a point more if offshore, which blows inflatables out to sea, or onshore, which churns the water), waves (1 to swim with care, 4 if dangerous, 1 more for high rip current risk), very high UV (half a point; extreme, 1), water below 59 °F (1) and spring high tides (1: little sand left).
- Swimming: calm, use care (waves from 2.6 ft, or long swell) or dangerous (from 6.6 ft, or 4.9 ft with a long period), based on how much of the wave reaches this shore given the way it faces. In the U.S., today's and tomorrow's rip current risk comes from the National Weather Service surf zone forecast when it issues one; otherwise we estimate it from the waves.
- Best windows: runs of 2 to 5 hours rated 4 or more and close to the best hour, at least one hour apart.
- Day rating: the average of the best window; a 2-hour window keeps 85% of it and a 3-hour window 95%.
Today, in the best window: sun 0 of 3, warmth 0 of 4, calm sea 0 of 1, water 0 of 1 and tide 0.8 of 1; minus cold 4, wind 3, waves 2 and cold water 1; short window: the rating keeps 85%.
It's a guide, not a guarantee: weather changes and every beach is different. Always follow the lifeguard's flags.
Questions about the beach in St Martin's
Is it a beach day in St Martin's today?
Not a beach day: 0/10. No good beach time today.
What are the swimming conditions in St Martin's today?
11 ft waves every 11 s: swim with care and stay where you can stand. High rip current risk. If you're caught in a rip current, don't swim against it: swim parallel to shore and wave for help. Always follow the lifeguard's flags.
How warm is the water in St Martin's?
About 56 °F today: very cold. That's the sea surface temperature offshore; it can differ a little at the shoreline.
How much sun protection do I need in St Martin's today?
UV reaches 2 (low): SPF 15 sunscreen, sunglasses and a hat.
When is low tide in St Martin's?
Today low tide is at 12:05 pm: that's when there's the most sand. High tide is at 5:36 am and 5:57 pm. Coefficient 96 (spring tides): little sand left at high tide.
What about tomorrow? Will it be a beach day in St Martin's?
Tomorrow, Thursday, October 29: not a beach day (0/10).
What beaches are near St Martin's?
Ganilly Bar (1.3 mi), Rushy Porth (1.5 mi), Cradle Porth (1.5 mi), Cook's Porth (1.6 mi) and Green Porth (1.8 mi). See below for amenities and water quality.
Are there jellyfish or sargassum today?
We don't know: there's no open data on jellyfish, sargassum or closures for each beach. Ask the lifeguard, check the flags or the local beach authority's website.
How is the rating worked out?
From the hourly forecast: sun and clouds, feels-like temperature, rain, wind (and whether it blows onshore or offshore), waves and their period, UV, water temperature and, where there is one, the tide. Each factor adds or takes away a fixed number of points and the rating sums them up out of 10.
More about St Martin's today
Learn more
Our own calculation, using the Open-Meteo forecast (ECMWF, NOAA GFS, Météo-France, Copernicus Marine and CAMS, CC BY 4.0), the tide from St Marys (Environment Agency) and the sun from astronomy-engine. This uses Environment Agency tide gauge data from the real-time data API (Beta): St Marys (E72324), https://environment.data.gov.uk/flood-monitoring/id/stations/E72324. Contains public sector information licensed under the Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Modified: harmonic constants fitted by TidePlanet from the 15-minute sea levels of 2025-10-29 to 2026-10-22 (356 days).