Surf Forecasts:
Cape Northumberland surf forecast from 11 Jun 2026:
- Best quality surf: Sunday 14 Jun, 3PM (local time) - 10ft (3.0m), 13s period, SW swell with glassy winds.
- Most powerful swell: Friday 12 Jun, 3PM (local time) - 10ft (3.0m), 19s period, SW swell with 6,479 kJ wave energy.
- Next surfable swell (1★+): Sunday 14 Jun, 6AM (local time) - 10ft (3.0m), 12s 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 Sunday (Jun 14) at 6AM. The primary swell is predicted to be 3.0m and 12s period with a secondary swell of 1.0m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cape Northumberland in the next 16 days are 3.0m 19s and forecast to arrive on Friday (Jun 12) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Friday (Jun 12) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 14th Jun) | 10ft (3.0m) 12s |
| Best Surf | 3PM (Sun 14th Jun) | 10ft (3.0m) 13s |
| Most Powerful | 3PM (Fri 12th Jun) | 10ft (3.0m) 19s |
Table - best surf conditions forecast for Cape Northumberland over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 14mm), heaviest on Sat morning. Warm (max 20°C on Fri afternoon, min 12°C on Sun morning). Winds decreasing (strong winds from the N on Fri night, calm by Sat night). | Days 5-7 Weather SummaryHeavy rain (total 54mm), heaviest during Mon night. Very mild (max 17°C on Mon afternoon, min 10°C on Sun night). Winds increasing (calm on Sun afternoon, fresh winds from the WNW by Wed morning). | ||||||||||||||||||||
Thu 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||
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 14 | SW 14 | SW 14 | SW 19 | SW 17 | WSW 16 | WSW 15 | SW 14 | SW 12 | SW 13 | SW 13 | SW 12 | WSW 12 | WSW 12 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SSW 11 | SSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5380 | 4191 | 2952 | 6479 | 4587 | 5805 | 4431 | 4215 | 2693 | 3284 | 2173 | 1388 | 715 | 1045 | 3940 | 3265 | 1945 | 1811 | 1411 | 631 | 686 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | cross-off | glassy | cross-off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross-on | cross |
High Tide | 10:43AM1.05m | 11:31AM1.14m | 12:16PM1.21m | 12:59PM1.24m | 1:39PM1.25m | 2:15PM1.23m | |||||||||||||||
Low Tide | 2:14AM0.47m | 2:44AM0.40m | 3:19AM0.34m | 3:58AM0.28m | 4:41AM0.25m | 5:26AM0.25m | 6:13AM0.27m | ||||||||||||||
 |  | | |  |  |  | | |  | | | |  |  |  |  |  | | | | |
 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 |
 | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | 4:53 |
mm | — | — | — | — | 1 | 12 | 1 | — | — | — | — | — | — | 33 | 8 | 3 | 10 | — | — | — | — |
Temp °C | 16 | 15 | 18 | 20 | 20 | 14 | 14 | 13 | 12 | 13 | 11 | 14 | 17 | 14 | 14 | 13 | 13 | 14 | 13 | 13 | 13 |
Feels °C | 13 | 11 | 9 | 11 | 11 | 9 | 9 | 7 | 9 | 11 | 7 | 9 | 15 | 12 | 10 | 9 | 10 | 10 | 5 | 3 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 19 | SW 17 | WSW 16 | WSW 15 | SW 14 | SW 12 | SW 13 | SW 13 | SW 12 | WSW 12 | WSW 12 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SSW 11 | SSW 12 |
| kJ | 5380 | 4191 | 2952 | 6479 | 4587 | 5805 | 4431 | 4215 | 2693 | 3284 | 2173 | 1388 | 715 | 1045 | 3940 | 3265 | 1945 | 1811 | 1411 | 631 | 686 |
Swell 2 Height (m) Direction Period (s) | W 15 | — | SW 22 | WSW 13 | — | WNW 11 | SSW 12 | — | SW 13 | SSW 13 | WSW 13 | WSW 12 | SSW 12 | SSW 11 | S 11 | S 11 | SSE 10 | SSE 10 | SSE 9 | SW 12 | — |
| kJ | 859 | — | 165 | 1808 | — | 1710 | 29 | — | 352 | 1760 | 983 | 648 | 634 | 205 | 114 | 22 | 34 | 19 | 8 | 260 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | S 13 | — | — | — | — | SW 19 | — | — | WSW 19 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 14 | — | — | — | — | 15 | — | — | 251 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | N 4 | NNW 6 | NW 8 | — | W 11 | — | — | — | — | — | — | — | — | S 4 | S 6 | — | — | ENE 3 | ENE 3 |
| kJ | — | — | 36 | 100 | 371 | — | 1168 | — | — | — | — | — | — | — | — | 31 | 94 | — | — | 2 | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 9 | 199 | 286 | 468 | 328 | 92 | 87 | 0 | 0 | 7 | 7 | 7 | 9 | 127 | 310 | 127 | 7 | 87 | 199 | 273 |
Best forecast wave conditions in South Australia - East Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 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.
Nearest