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Birsay Bay Surf Forecast
/ Scot – Orkney (6 surf breaks) /
Surf Forecasts:
Birsay Bay surfForecast / Scot – Orkney / UK
12 Day Weather and Surf, issued 5 pm Wednesday 17 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Birsay Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Birsay Bay sea temperature is
10.4° C
(Which is 1.2°C warmer than normal for this time of year)Best Forecast Surf Conditions for Birsay Bay this week:
The surf forecast for Birsay Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Dec 17) at 9PM. The primary swell is predicted to be 3.0m and 12s period with a secondary swell of 0.4m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Birsay Bay in the next 12 days are 6.5m 20s and forecast to arrive on Thursday (Dec 18) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Thursday (Dec 18) at 9PM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 17th Dec) | 10ft (3.0m) 12s |
| Best Surf | 9PM (Wed 17th Dec) | 10ft (3.0m) 12s |
| Most Powerful | 12PM (Thu 18th Dec) | 21ft (6.5m) 20s |
Table - best surf conditions forecast for Birsay Bay over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Moderate rain (total 10mm), heaviest on Wed afternoon. Very mild (max 10°C on Wed afternoon, min 7°C on Thu night). Winds decreasing (gales from the WSW on Fri afternoon, moderate winds from the S by Fri night). | Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Mon morning. Mild temperatures (max 9°C on Sat afternoon, min 8°C on Sat night). Winds decreasing (strong winds from the SSE on Sat night, light winds from the ENE by Mon night). | ||||||||||||||||||||||
Wed 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 20 | 19 | 18 | 16 | 15 | 15 | 13 | 12 | 12 | 17 | 16 | 14 | 13 | 12 | 11 | 10 | 15 | 13 | 12 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 3468 | 3523 | 33772 | 27907 | 19190 | 10755 | 10846 | 10871 | 3028 | 1392 | 1109 | 4258 | 4541 | 2216 | 747 | 353 | 151 | 74 | 93 | 232 | 184 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | cross- off | cross | cross- off | cross | cross | cross- off | off | off | off | off | cross- off | cross- off | cross- off | off | cross | cross | off | cross- off | ||
High Tide / height (m) | 7:03PM 2.63 | 7:24AM 2.76 | 7:43PM 2.70 | 8:00AM 2.85 | 8:21PM 2.75 | 8:35AM 2.92 | 8:57PM 2.75 | 9:10AM 2.96 | 9:32PM 2.71 | 9:44AM 2.97 | 10:08PM 2.64 | 10:18AM 2.95 | 10:44PM 2.55 | 10:53AM 2.90 | |||||||||
Low Tide / height (m) | 1:15AM 0.67 | 1:39PM 0.63 | 1:51AM 0.61 | 2:15PM 0.54 | 2:26AM 0.57 | 2:51PM 0.47 | 3:00AM 0.54 | 3:28PM 0.43 | 3:34AM 0.53 | 4:04PM 0.42 | 4:08AM 0.56 | 4:42PM 0.44 | 4:44AM 0.61 | ||||||||||
Wed 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | |||||||||||||||||
| Sunrise | - | - | 9:03 | - | - | 9:04 | - | - | 9:06 | - | - | 9:06 | - | - | 9:07 | - | - | 9:07 | - | - | 9:07 | ||
| Sunset | 3:14 | - | - | 3:14 | - | - | 3:14 | - | - | 3:15 | - | - | 3:15 | - | - | 3:15 | - | - | 3:15 | - | - | ||
 |  |  |  |  | | |  | |  |  |  | | |  | | | | | | | |||
Rain (mm) | 2 | 1 | 1 | - | 2 | 2 | 2 | - | - | - | - | - | - | - | 2 | - | - | - | - | 1 | - | ||
| Temp. °C | 10 | 9 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | ||
| Feels °C (?) | 2 | 2 | -4 | -1 | -5 | -2 | -5 | -2 | 2 | 1 | 2 | 1 | 3 | 2 | 0 | 0 | 1 | 3 | 2 | 0 | -2 | ||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Birsay Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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Information about the Birsay Bay Surf forecast
The above surf forecast table for Birsay Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Birsay Bay can be found by selecting the local surf guide option on the grey menu. Our Birsay Bay 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 (Birsay Bay) 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 Birsay Bay 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.
Are you planning a holiday in Orkney Islands? If you are looking for accommodation near Birsay Bay, camping, hotels and holiday cottages in Orkney Islands, consider staying in Kirkwall which is 26 km (16 miles) away. Other places in and around Orkney Islands where you can find information about places to rent, and car hire include Scrabster which is 58 km (36 miles) away and Wick, 79 km (49 miles) away.
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