Surf Forecasts:
Dias Beach surf forecast from 18 Sep 2026:
- Best quality surf: Sunday 20 Sep, 2AM (local time) - 5ft (1.5m), 15s period, SSW swell with glassy winds.
- Most powerful swell: Sunday 20 Sep, 2AM (local time) - 5ft (1.5m), 15s period, SSW swell with 949 kJ wave energy.
- Next surfable swell (1★+): Saturday 19 Sep, 8AM (local time) - 6ft (1.8m), 8s period with ESE swell.
Best Forecast Surf Conditions for Dias Beach this week:
The surf forecast for Dias Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 19) at 8AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.8m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Dias Beach in the next 16 days are 1.5m 15s and forecast to arrive on Sunday (Sep 20) at 2AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Wednesday (Sep 23) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sat 19th Sep) | 6ft (1.8m) 8s |
| Best Surf | 2AM (Sun 20th Sep) | 5ft (1.5m) 15s |
| Most Powerful | 2AM (Sun 20th Sep) | 5ft (1.5m) 15s |
Table - best surf conditions forecast for Dias Beach over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 19°C on Sun morning, min 13°C on Fri night). Winds decreasing (fresh winds from the ESE on Fri afternoon, calm by Sat night). | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Tue night. Warm (max 31°C on Tue afternoon, min 17°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||
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) | SSW 11 | SSW 14 | E 8 | ESE 8 | ESE 8 | SSW 15 | SSW 14 | SW 14 | SW 13 | SW 12 | ESE 6 | E 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | S 6 | S 16 | SSW 14 | SSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 320 | 487 | 770 | 306 | 238 | 949 | 569 | 357 | 190 | 149 | 154 | 734 | 245 | 178 | 115 | 79 | 116 | 119 | 507 | 834 | 811 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | cross-on | glassy | on | on | cross-on | on | on | cross | cross-off | cross-off | cross-on | glassy | on | on | on | on | glassy |
High Tide | 7:23PM1.40m | 8:21AM1.26m | 9:07PM1.26m | 12:02PM1.27m | 00:17AM1.31m | 1:08PM1.44m | 1:13AM1.46m | 1:39PM1.61m | 1:47AM1.62m | 2:05PM1.78m | 2:16AM1.76m | 2:31PM1.93m | 2:44AM1.89m | ||||||||
Low Tide | 12:54PM0.88m | 1:41AM0.92m | 2:04PM1.05m | 4:50AM0.99m | 6:19PM1.02m | 6:39AM0.86m | 7:13PM0.86m | 7:19AM0.71m | 7:44PM0.69m | 7:49AM0.56m | 8:12PM0.53m | 8:17AM0.43m | 8:39PM0.37m | ||||||||
 |  |  | | | | | | | | | | |  |  |  | |  | | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — |
 | — | 6:23 | — | — | 6:24 | — | — | 6:25 | — | — | 6:25 | — | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 13 | 6 | — | 1 | — | — | — |
Temp °C | 15 | 16 | 14 | 16 | 18 | 15 | 19 | 19 | 16 | 19 | 20 | 22 | 30 | 31 | 20 | 18 | 17 | 18 | 19 | 19 | 20 |
Feels °C | 8 | 8 | 10 | 14 | 16 | 15 | 18 | 17 | 15 | 18 | 18 | 21 | 27 | 31 | 23 | 20 | 17 | 19 | 18 | 17 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 14 | ESE 8 | ESE 8 | ESE 8 | SSW 15 | SSW 14 | SW 14 | SW 13 | SW 12 | SW 12 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 | S 16 | SSW 14 | ESE 7 |
| kJ | 319 | 487 | 520 | 306 | 238 | 949 | 569 | 357 | 190 | 149 | 114 | 486 | 245 | 178 | 110 | 79 | 116 | 52 | 507 | 834 | 387 |
Swell 2 Height (m) Direction Period (s) | — | S 20 | SSW 13 | SSW 12 | SW 12 | ESE 8 | ESE 8 | ESE 8 | E 8 | S 18 | SSW 16 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SW 11 | SW 11 | SSE 10 | SW 10 | SW 10 | SSW 13 |
| kJ | — | 7 | 265 | 190 | 137 | 171 | 128 | 119 | 64 | 25 | 83 | 165 | 154 | 133 | 115 | 57 | 29 | 35 | 73 | 113 | 811 |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 18 | SSW 16 | SSW 15 | — | — | — | SSE 5 | — | — | SSW 11 | SW 11 | — | SW 7 | SSE 14 | S 12 | SW 11 | SSE 10 | SSE 10 | — |
| kJ | — | — | 31 | 84 | 167 | — | — | — | 9 | — | — | 84 | 73 | — | 17 | 69 | 77 | 29 | 21 | 19 | — |
Wind waves Height (m) Direction Period (s) | ESE 6 | ESE 7 | E 8 | — | — | — | — | — | — | ESE 8 | ESE 6 | E 8 | NNW 2 | SW 3 | — | WSW 5 | — | S 6 | SE 6 | ESE 6 | E 8 |
| kJ | 320 | 435 | 770 | — | — | — | — | — | — | 96 | 154 | 734 | 1 | 2 | — | 19 | — | 119 | 184 | 325 | 558 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 340 | 62 | 23 | 60 | 4 | 0 | 6 | 62 | 23 | 249 | 62 | 23 | 23 | 72 | 4 | 0 | 62 | 62 | 62 | 256 | 0 |
Best forecast wave conditions in Garden Route | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Dias Beach 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 Dias Beach Surf forecast
The above surf forecast table for Dias Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Dias Beach can be found by selecting the local surf guide option on the grey menu. Our Dias Beach 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 (Dias Beach) 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 Dias Beach 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.
Dias Beach is 6 km (4 miles) from the city of Mossel Bay. If you plan a holiday in Garden Route, look for hotels and other accommodation in Mossel Bay. Mossel Bay has rooms for a wide range of budgets as well as car hire and transport links.
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