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Portinfer surfForecast / Guernsey / UK
12 Day Weather and Surf, issued 6 am Thursday 18 Sep 2025 BST
Best Forecast Surf Conditions for Portinfer this week:
The surf forecast for Portinfer over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 19) at 4AM. The primary swell is predicted to be 1.4m and 10s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Portinfer in the next 12 days are 3.5m 9s and forecast to arrive on Sunday (Sep 21) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Sep 24) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 19th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 4AM (Fri 19th Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 7AM (Sun 21st Sep) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Portinfer over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 21°C on Fri afternoon, min 15°C on Sat night). Winds increasing (calm on Fri night, near gales from the SW by Sat afternoon). | Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun night. Very mild (max 16°C on Tue night, min 12°C on Tue morning). Winds decreasing (strong winds from the SW on Sun morning, calm by Mon morning). | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 12 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 6 | 6 | 6 | 5 | 5 | 4 | 13 | 6 | 6 | 10 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 1122 | 736 | 505 | 318 | 379 | 268 | 203 | 160 | 1604 | 1404 | 642 | 167 | 312 | 136 | 53 | 45 | 26 | 14 | 107 | 114 | 76 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross | cross- off | on | cross | cross- off | cross- off | cross | cross | cross- on | cross- on | glass | cross- off | cross | cross | cross | cross | cross | cross | cross- off |
High Tide / height (m) | 5:24PM 6.56 | 5:55AM 6.66 | 6:10PM 7.13 | 6:35AM 7.19 | 6:48PM 7.60 | 7:09AM 7.61 | 7:21PM 7.94 | 7:39AM 7.90 | 7:52PM 8.13 | 8:09AM 8.04 | 8:21PM 8.15 | 8:37AM 8.03 | 8:50PM 8.02 | ||||||||
Low Tide / height (m) | 11:19AM 2.27 | 11:51PM 1.70 | 12:10PM 1.70 | 12:34AM 1.17 | 12:48PM 1.20 | 1:08AM 0.75 | 1:21PM 0.82 | 1:39AM 0.48 | 1:51PM 0.57 | 2:08AM 0.36 | 2:20PM 0.47 | 2:35AM 0.40 | 2:48PM 0.52 | 3:02AM 0.58 | |||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| Sunrise | 6:48 | - | - | 6:50 | - | - | 6:52 | - | - | 6:54 | - | - | 6:54 | - | - | 6:56 | - | - | 6:58 | - | - |
| Sunset | - | 7:17 | - | - | 7:15 | - | - | 7:14 | - | - | 7:10 | - | - | 7:08 | - | - | 7:07 | - | - | 7:05 | - |
 |  |  | | |  | | | | | |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | 2 | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 19 | 18 | 19 | 21 | 17 | 19 | 21 | 15 | 15 | 14 | 14 | 14 | 15 | 15 | 13 | 14 | 16 | 14 | 14 | 15 |
| Feels °C (?) | 16 | 19 | 18 | 15 | 18 | 16 | 17 | 18 | 5 | 6 | 7 | 7 | 13 | 9 | 9 | 5 | 8 | 10 | 8 | 9 | 11 |
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Guernsey
Still cross-shore at Portinfer (light winds from the SW at Guernsey Airport 7 km from Portinfer). A 1.6m groundswell from the W
1 h 58 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Portinfer 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.
Information about the Portinfer Surf forecast
The above surf forecast table for Portinfer provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Portinfer can be found by selecting the local surf guide option on the grey menu. Our Portinfer 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 (Portinfer) 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 Portinfer 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 Guernsey? If you are looking for accommodation near Portinfer, camping, hotels and holiday cottages in Guernsey, consider staying in Saint Peter Port which is 6 km (4 miles) away. Other places in and around Guernsey where you can find information about places to rent, and car hire include Guernsey which is 7 km (4 miles) away, Saint Helier, Octeville and Equeurdreville-Hainneville.
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