Surf Forecasts:
Cape Northumberland surf forecast from 14 Nov 2026:
- Best quality surf: Thursday 26 Nov, 7PM (local time) - 8ft (2.5m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 24 Nov, 4AM (local time) - 13ft (4.0m), 15s period, SW swell with 7,377 kJ wave energy.
- Next surfable swell (1★+): Tuesday 17 Nov, 7AM (local time) - 7ft (2.2m), 13s 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 Tuesday (Nov 17) at 7AM. The primary swell is predicted to be 2.2m and 13s 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 4.0m 15s and forecast to arrive on Tuesday (Nov 24) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 5s period and expected on Friday (Nov 27) at 4PM.
| Wave Type | Time (ACDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Tue 17th Nov) | 7ft (2.2m) 13s |
| Best Surf | 7PM (Thu 26th Nov) | 8ft (2.5m) 17s |
| Most Powerful | 4AM (Tue 24th Nov) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Cape Northumberland over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Sun morning. Very mild (max 14°C on Sat afternoon, min 11°C on Sun night). Winds decreasing (fresh winds from the S on Sun morning, light winds from the SSE by Tue morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Thu morning, min 12°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Sat 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | ||||||||||||||
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) | SW 15 | SW 16 | SW 15 | SW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 13 | SSW 13 | SSW 13 | SSW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2390 | 3021 | 3281 | 2233 | 3511 | 3460 | 2678 | 1915 | 1256 | 1135 | 1523 | 2215 | 2098 | 1547 | 954 | 665 | 862 | 640 | 659 | 513 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | on | cross-on |
High Tide | 3:57AM1.12m | 1:10PM0.69m | 4:27AM1.07m | 5:02AM1.01m | 5:47AM0.94m | 7:18AM0.87m | 1:32AM0.75m | 9:31AM0.81m | 00:00AM0.85m | |||||||||||
Low Tide | 8:05PM0.24m | 11:09AM0.68m | 8:22PM0.31m | 8:35PM0.39m | 8:31PM0.48m | 7:18PM0.56m | 5:09PM0.56m | 3:58AM0.74m | 4:53PM0.52m | |||||||||||
 |  |  | |  | |  |  |  | | | | | | | | | | | | |
 | — | — | 5:47 | — | — | 5:46 | — | — | 5:45 | — | — | 5:45 | — | — | 5:43 | — | — | 5:43 | — | — |
 | 7:54 | — | — | 7:55 | — | — | 7:57 | — | — | 7:59 | — | — | 8:00 | — | — | 8:00 | — | — | 8:01 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 13 | 12 | 12 | 12 | 11 | 12 | 13 | 13 | 13 | 14 | 13 | 16 | 25 | 24 | 21 | 21 | 17 | 14 |
Feels °C | 9 | 10 | 7 | 5 | 4 | 7 | 5 | 9 | 9 | 8 | 8 | 11 | 8 | 12 | 22 | 20 | 19 | 17 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 15 | SW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 13 | SSW 13 | SSW 13 | SSW 12 |
| kJ | 2390 | 3021 | 3281 | 2233 | 3511 | 3460 | 2678 | 1915 | 1256 | 1135 | 1523 | 2215 | 2098 | 1547 | 954 | 665 | 862 | 640 | 659 | 513 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 15 | — | — | — | SSW 15 | S 13 | S 21 | SW 20 | SW 18 | SW 16 | SW 16 | SW 14 | ESE 6 | SE 6 | SW 18 | SW 18 |
| kJ | — | — | — | — | 134 | — | — | — | 46 | 468 | 9 | 60 | 81 | 171 | 302 | 459 | 21 | 19 | 53 | 112 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 12 | SW 12 | — | SW 20 | — | E 6 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 87 | 118 | 51 | — | 15 | — | 1 |
Wind waves Height (m) Direction Period (s) | — | — | SSW 6 | SSW 7 | — | — | — | — | — | — | SE 4 | — | SSE 4 | — | — | NE 3 | — | NW 4 | WNW 4 | W 7 |
| kJ | — | — | 108 | 205 | — | — | — | — | — | — | 28 | — | 38 | — | — | 5 | — | 9 | 24 | 181 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 92 | 87 | 274 | 864 | 513 | 393 | 393 | 92 | 92 | 273 | 332 | 71 | 393 | 71 | 9 | 72 | 28 | 87 | 142 | 7 |
Best forecast wave conditions in South Australia - East Coast | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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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