Reef
both
Level 5/10

Sandy Bay

Llantwit Major, UK
🪨Rocks🌀Strong rips

Sandy Bay at Llantwit Major is a Welsh bodyboard and surf wedge that wakes up when Bristol Channel energy meets the right tide and bank shape. The wave is fickle, short and powerful, with local knowledge making a big difference. Treat the pin and conditions as a starting point and check the tide carefully before committing.

Sandy Bay surf forecast

Model forecast for swell, wind and tide.

10-Day Forecast
Today8
15
Poor
0.2m@9s
10km/h
Mon9
0
Poor
0.1m@9s
26km/h
Tue10
15
Poor
0.4m@12s
21km/h
Wed11
30
Poor
0.6m@14s
18km/h
Thu12
15
Poor
0.4m@12s
23km/h
Fri13
0
Poor
0.2m@10s
24km/h
Sat14
15
Poor
0.1m@13s
15km/h
Sun15
15
Poor
0.2m@12s
14km/h
Mon16
16
Poor
0.5m@13s
18km/h
Tue17
16
Poor
0.5m@12s
31km/h
5+ days out, less certain

Today's Conditions

Find Flights
Best session: MorningAM 10 km/h · PM 11 km/h · Tide at 11am (0.0m)
Swell
0.2m
W(262°)
Score: 0/25
Period
9s
Short period
Score: 4/25
Wind
10km/h
E(87°)
Score: 13/25
Weather
9°C
0.0mm20%
First light 6:49amSunrise 7:19amSunset 4:35pmLast light 5:05pm
Windswell
—
Secondary
—
Confidence
100%

Location & Conditions

Loading map...
Swell0.2m @9s W outside window
Wind10 km/h E cross-shore
SwellWind: Offshore Cross Onshore
Showing forecast for today · all day

Hourly Forecast, Tide & Strike Windows

Strike window: 7:01–8:24am · droppingStrike window: 1:45–3:06pm · risingIdeal tide: mid
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
°C
7°
8°
11°
11°
8°
6°
7°
10°
10°
9°
8°
8°
9°
10°
10°
12°
12°
13°
13°
14°
13°
11°
11°
11°
9°
7°
7°
9°
8°
7°
7°
8°
6°
6°
5°
2°
4°
6°
6°
5°
6°
9°
11°
12°
13°
12°
12°
12°
11°
10°
2m1.0
sec
9s
9s
9s
9s
9s
4s
4s
14s
12s
12s
12s
12s
12s
12s
12s
14s
14s
14s
14s
14s
12s
12s
12s
12s
12s
10s
10s
10s
10s
10s
13s
13s
13s
13s
13s
12s
12s
12s
12s
12s
13s
13s
13s
13s
13s
12s
12s
12s
12s
12s
swell
windkm/h
9g13
12g21
9g16
9g15
13g21
22g37
24g41
28g48
29g49
27g47
23g44
21g41
21g40
20g37
18g34
19g36
21g38
20g37
17g32
12g23
13g23
20g37
24g45
26g47
28g52
25g46
26g47
27g50
23g44
19g36
21g39
21g41
14g28
11g23
11g23
16g27
15g27
14g27
12g28
10g27
13g21
17g27
21g34
17g40
21g45
46g82
42g83
32g79
21g68
12g54
tidem
4:52am8.8m
11:01am0.0m
5:12pm8.9m
5:32am8.8m
11:37am0.0m
5:52pm8.8m
6:09am8.8m
12:13pm0.2m
6:28pm8.7m
6:46am8.8m
12:47pm0.5m
7:02pm8.6m
1:03am0.6m
7:18am8.4m
1:24pm0.5m
7:37pm8.0m
1:35am0.8m
7:51am7.9m
1:57pm0.8m
8:08pm7.5m
2:11am1.1m
8:22am7.5m
2:36pm1.1m
8:40pm7.0m
2:50am1.3m
8:56am7.0m
3:15pm1.5m
9:15pm6.7m
3:34am1.8m
9:35am6.7m
4:06pm1.9m
9:56pm6.2m
Ideal tide (from tide preference)Strike windowNight

Tide times today

4:52 am
High · 8.76m
11:01 am
Low · 0.03m
5:12 pm
High · 8.91m
Times shown in spot-local time.

Strike Score Breakdown

15
Poor
Components
Swell Direction10/25
Swell Size0/25
Swell Period4/25
Wind13/25
Raw Score27/100
Adjustments
📉 Undersized Swell-11
🚫 Undersized Capmax 15
Adjusted Score16/100
Confidence
Multiplier×1.00
Final Score15

Plan Your Strike

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Swell Requirements

Optimal direction
SW (235°)
Direction range
210° - 260°
Size range
0.9m - 2.4m
Ideal size
1.6m - 2m
Height multiplier
0.97×
Ideal period
14s+

Wind Requirements

Optimal direction
NNE (20°)
Offshore range
0° - 45°

Tide Requirements

Optimal tide
mid

Water temp

13°C

Wetsuit

4/3mm fullsuit

Bottom

Mixed

Difficulty

5/10

Crowd level

3/10

Frequently Asked Questions

What kind of wave is Sandy Bay?

Sandy Bay is a reef break in Llantwit Major, UK, with peaks that run both left and right. It's also a renowned bodyboarding wave.

What swell works best at Sandy Bay?

Sandy Bay picks up swell from the SSW round to the W, and it's best when it's coming straight out of the SW. It starts working at around 0.9m and handles up to about 2.4m, with the sweet spot around 1.6 to 2m. Period matters too: aim for 14s or longer, as anything under 10s tends to be weak. These are the numbers our scoring uses, so treat them as a guide rather than a promise.

What wind is offshore at Sandy Bay?

A NNE wind is dead offshore at Sandy Bay, and anything from the N round to the NE keeps it clean. The morning is typically the best window, roughly 6am to midday. Light winds from other directions can still be fine; strong offshores can make it hard to get into waves.

What tide is best at Sandy Bay?

Sandy Bay is at its best around mid tide.

When is the best time of year to surf Sandy Bay?

The most reliable run of swell at Sandy Bay comes Sep to Mar.

How cold is the water at Sandy Bay?

The water at Sandy Bay averages around 13°C, so you'll want a 4/3mm fullsuit. It shifts a few degrees through the year, so check the season before you pack.

Is Sandy Bay good for beginners?

It's more of an intermediate wave, rated 5/10 for difficulty, so newer surfers are best off sticking to the smaller days. The lineup is usually quiet (crowd 3/10). Rock platform. Bristol Channel funnels swell.

How do I get to Sandy Bay?

The nearest airport on our list is CWL, then it's roughly a 30-minute drive.

What other surf spots are near Sandy Bay?

The closest breaks we track are Porthcawl Point (16 km), Rest Bay (17 km) and Lynmouth (28 km), handy when Sandy Bay isn't working.

Best Season

Peak: Sep, Oct, Nov, Dec, Jan, Feb, Mar

Getting There

Airport
CWL
Drive time
30 min
Data quality
community

Strike Log

Community Discussion