Surf Forecasts:
Cape Northumberland surf forecast from 9 Jun 2026:
- Best quality surf: Saturday 13 Jun, 12AM (local time) - 15ft (4.5m), 17s period, WSW swell with cross-shore winds.
- Most powerful swell: Saturday 13 Jun, 12AM (local time) - 15ft (4.5m), 17s period, WSW swell with 11,706 kJ wave energy.
- Next surfable swell (1★+): Thursday 11 Jun, 3AM (local time) - 15ft (4.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Cape Northumberland this week:
The surf forecast for Cape Northumberland over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jun 11) at 3AM. The primary swell is predicted to be 4.5m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cape Northumberland in the next 16 days are 4.5m 17s and forecast to arrive on Saturday (Jun 13) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Monday (Jun 15) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 11th Jun) | 15ft (4.5m) 16s |
| Best Surf | 12AM (Sat 13th Jun) | 15ft (4.5m) 17s |
| Most Powerful | 12AM (Sat 13th Jun) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Cape Northumberland over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 7mm), mostly falling on Tue night. Very mild (max 18°C on Fri morning, min 12°C on Tue night). Winds decreasing (strong winds from the N on Tue night, light winds from the NNW by Wed night). | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Fri night. Warm (max 20°C on Fri afternoon, min 12°C on Sat night). Winds decreasing (strong winds from the N on Fri night, light winds from the WNW by Sat night). | ||||||||||||||||||||
Tue 9 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 17 | SW 15 | SW 14 | WSW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 19 | WSW 17 | SW 16 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 12 | WSW 11 | WSW 12 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2302 | 1857 | 2317 | 2974 | 10165 | 7837 | 5380 | 4005 | 2889 | 5663 | 11706 | 6363 | 5729 | 4369 | 3349 | 2173 | 2008 | 1597 | 1440 | 1294 | 1922 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-off | cross | cross | cross-off | cross-off | glassy | off |
High Tide | 5:41PM0.92m | 8:45AM0.85m | 6:02PM0.83m | 9:50AM0.95m | 10:43AM1.05m | 11:31AM1.14m | 12:16PM1.21m | 12:59PM1.24m | |||||||||||||
Low Tide | 1:23AM0.60m | 1:48PM0.78m | 1:47AM0.54m | 2:14AM0.47m | 2:44AM0.40m | 3:19AM0.34m | 3:58AM0.28m | 4:41AM0.25m | |||||||||||||
 |  |  |  |  |  | | | | |  | | |  | | | | |  | |  | |
 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 |
 | 4:53 | — | — | 4:53 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | 4:52 |
mm | — | 5 | 2 | — | — | — | — | — | — | — | 8 | — | — | — | — | — | — | — | 6 | 10 | 3 |
Temp °C | 17 | 17 | 14 | 14 | 14 | 14 | 15 | 16 | 18 | 20 | 20 | 14 | 15 | 14 | 14 | 15 | 13 | 15 | 13 | 14 | 15 |
Feels °C | 8 | 7 | 8 | 9 | 11 | 10 | 12 | 9 | 10 | 13 | 10 | 6 | 9 | 10 | 7 | 9 | 9 | 9 | 9 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 15 | SW 14 | WSW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 19 | SW 17 | SW 16 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 12 | WSW 11 | WSW 12 | SW 13 |
| kJ | 2302 | 1857 | 2317 | 2974 | 10165 | 7837 | 5380 | 4005 | 2889 | 5663 | 6037 | 6363 | 5729 | 4369 | 3349 | 2173 | 2008 | 1597 | 1440 | 1294 | 1922 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | — | — | SW 18 | — | — | — | — | SW 22 | SW 19 | — | WNW 10 | WNW 9 | — | S 11 | S 11 | S 10 | SSW 18 | S 12 | SW 16 | S 12 |
| kJ | 228 | — | — | 1175 | — | — | — | — | 290 | 2789 | — | 663 | 287 | — | 59 | 85 | 51 | 32 | 184 | 720 | 44 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SSW 16 | — | — | — | — | — | — | — | — | — | — | — | — | SW 20 | S 14 | SW 18 | S 11 | S 11 |
| kJ | — | — | — | 651 | — | — | — | — | — | — | — | — | — | — | — | — | 15 | 106 | 79 | 160 | 157 |
Wind waves Height (m) Direction Period (s) | N 4 | NW 9 | W 11 | — | — | — | — | — | N 4 | NW 7 | WSW 17 | — | — | — | NNW 4 | — | NNW 4 | NNW 4 | — | — | SE 4 |
| kJ | 22 | 760 | 1326 | — | — | — | — | — | 12 | 167 | 11706 | — | — | — | 20 | — | 10 | 18 | — | — | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 216 | 440 | 87 | 142 | 7 | 0 | 0 | 7 | 199 | 286 | 468 | 273 | 273 | 7 | 7 | 87 | 7 | 7 | 7 | 0 | 0 |
Best forecast wave conditions in South Australia - East Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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 Cape Northumberland 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 Cape Northumberland Surf forecast
The above surf forecast table for Cape Northumberland provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cape Northumberland can be found by selecting the local surf guide option on the grey menu. Our Cape Northumberland 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 (Cape Northumberland) 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 Cape Northumberland 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.
Cape Northumberland is 6 km (4 miles) from Allendale East. If you plan a holiday in South Australia - East Coast, look for hotels and other accommodation in Allendale East. Allendale East has rooms for a wide range of budgets as well as car hire and transport links.
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