Surf Forecasts:
Mablethorpe surf forecast from 17 Aug 2026:
- Most powerful swell: Friday 21 Aug, 4AM (local time) - 4.5ft (1.3m), 8s period, N swell with 223 kJ wave energy.
Best Forecast Surf Conditions for Mablethorpe this week:
The most powerful waves expected at Mablethorpe in the next 16 days are 1.3m 8s and forecast to arrive on Friday (Aug 21) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Aug 18) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Fri 21st Aug) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Mablethorpe over the next 16 days.
The Lowdown
Alright, let’s cut through the fluff. For Mablethorpe, it’s a tough 16 days. The first twelve days are a total write-off. No surf to speak of. Tiny swell, wrong wind, no energy.
The first real chance you get is on Saturday, August 29th. We’re looking at a 2ft to 2ft swell from the north, with a 12-second period. That’s a long period groundswell, so there’s some push behind it, but it’s tiny. The combined swell energy is moderate, hitting 102 (Saturday morning) and 133 (Saturday afternoon). The wind is offshore from the WSW, light to moderate, so the waves will be clean. The wave comment calls it “very ordinary conditions,” and I’m not gonna argue with that. It’s the only blip of surf in the whole 16-day window.
Mablethorpe is an inconsistent, fairly exposed beach break. The swell direction is north, which is what the break likes. The water temperature is about average for this time of year. You might see a few other heads out there, but with waves this small, it won’t be crowded.
After that, Sunday the 30th and Monday the 31st go right back into the gutter. Poor surf, small, weak swell, and messy cross-shore winds. No good.
So, bottom line: if you’re jonesing for a session, Saturday the 29th of August is your only real option. It’s clean but tiny and ordinary. Otherwise, it’s a long, flat spell. Forecasts can shift, but as it stands, you’re better off waiting for the next one.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 21°C on Tue morning, min 13°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the WNW by Tue afternoon). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu morning, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | N 8 | N 8 | N 8 | N 8 | N 7 | N 5 | N 8 | N 8 | NNE 7 | NNE 8 | N 8 | N 5 | N 8 | NNE 8 | N 7 | N 8 | N 7 | NNE 7 | N 7 | N 7 | N 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1 | 1 | 4 | 1 | 4 | 5 | 11 | 18 | 10 | 19 | 63 | 71 | 120 | 178 | 156 | 135 | 114 | 52 | 39 | 26 | 23 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross | off | off | off | off | off | cross-off | off | cross | cross-off | cross-off | cross | cross | cross | on | cross-off | cross-off | cross-off | cross-off |
High Tide | 9:34AM5.53m | 10:05PM4.90m | 10:13AM5.15m | 10:42PM4.58m | 10:54AM4.72m | 11:22PM4.23m | 11:42AM4.29m | 00:12AM3.91m | 12:45PM3.91m | 1:25AM3.68m | 2:13PM3.71m | 2:55AM3.67m | 3:40PM3.76m | ||||||||
Low Tide | 3:59PM0.38m | 4:05AM0.97m | 4:33PM0.81m | 4:40AM1.24m | 5:08PM1.26m | 5:18AM1.55m | 5:48PM1.69m | 6:05AM1.86m | 6:42PM2.05m | 7:12AM2.13m | 8:06PM2.26m | 9:03AM2.18m | 9:56PM2.18m | ||||||||
 | |  |  | |  | | | |  | |  |  | | | | | | | | | |
 | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:46 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — |
 | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — |
mm | — | — | 4 | — | — | — | — | — | 1 | 1 | 2 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 17 | 21 | 21 | 17 | 19 | 20 | 17 | 18 | 16 | 14 | 16 | 15 | 14 | 16 | 15 | 15 | 19 | 21 | 18 |
Feels °C | 18 | 15 | 16 | 16 | 15 | 14 | 13 | 14 | 14 | 16 | 11 | 9 | 10 | 9 | 11 | 12 | 12 | 12 | 16 | 19 | 16 |
Swell 1 Height (m) Direction Period (s) | N 8 | N 8 | N 8 | N 8 | N 7 | N 5 | N 8 | N 8 | NNE 7 | NNE 8 | — | — | — | — | NNE 8 | NNE 8 | NNE 7 | NNE 7 | N 7 | N 7 | N 7 |
| kJ | 1 | 1 | 4 | 1 | 4 | 5 | 11 | 18 | 10 | 19 | — | — | — | — | 96 | 81 | 67 | 52 | 39 | 26 | 23 |
Swell 2 Height (m) Direction Period (s) | — | — | — | N 5 | — | N 7 | — | — | — | S 4 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 1 | — | 4 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | N 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 3 | W 3 | WNW 3 | — | W 3 | WSW 2 | — | SW 3 | N 8 | N 5 | N 8 | NNE 8 | N 7 | N 8 | N 7 | — | — | — | — |
| kJ | — | — | 1 | 1 | 3 | — | 1 | 1 | — | 2 | 63 | 71 | 120 | 178 | 156 | 135 | 114 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 457 | 544 | 646 | 325 | 582 | 266 | 485 | 457 | 342 | 50 | 444 | 278 | 351 | 220 | 114 | 87 | 338 | 49 | 87 | 118 | 50 |
Best forecast wave conditions in Lincolnshire | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Mablethorpe Surf forecast
The above surf forecast table for Mablethorpe provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mablethorpe can be found by selecting the local surf guide option on the grey menu. Our Mablethorpe surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Mablethorpe) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Mablethorpe may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Mablethorpe is 20 km (12 miles) from Skegness. If you plan a holiday in Lincolnshire, look for hotels and other accommodation in Skegness. Skegness has rooms for a wide range of budgets as well as car hire and transport links.
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