Surf Forecasts:
Cape Northumberland surf forecast from 1 Jul 2026:
- Best quality surf: Thursday 2 Jul, 6PM (local time) - 20ft (6.0m), 14s period, WSW swell with cross-onshore winds.
- Most powerful swell: Friday 3 Jul, 12AM (local time) - 26ft (8.0m), 17s period, WSW swell with 35,227 kJ wave energy.
- Next surfable swell (1★+): Thursday 2 Jul, 6PM (local time) - 20ft (6.0m), 14s period with WSW 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 (Jul 02) at 6PM. The primary swell is predicted to be 6.0m and 14s period with a secondary swell of 3.0m and 18s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Cape Northumberland in the next 16 days are 8.0m 17s and forecast to arrive on Friday (Jul 03) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Jul 06) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 2nd Jul) | 20ft (6.0m) 14s |
| Best Surf | 6PM (Thu 2nd Jul) | 20ft (6.0m) 14s |
| Most Powerful | 12AM (Fri 3rd Jul) | 26ft (8.0m) 17s |
Table - best surf conditions forecast for Cape Northumberland over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 41mm), heaviest during Wed afternoon. Very mild (max 15°C on Wed afternoon, min 11°C on Thu afternoon). Winds decreasing (near gales from the WSW on Thu night, moderate winds from the SW by Fri night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 13°C on Mon afternoon, min 7°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wed 1 | Thursday 2 | Friday 3 | Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | |||||||||||||||
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 13 | W 9 | W 10 | WSW 11 | WSW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SW 16 | SW 15 | SW 19 | SW 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 792 | 1228 | 2267 | 5022 | 35227 | 23858 | 13567 | 6665 | 2125 | 4232 | 11148 | 13551 | 9261 | 5380 | 2606 | 1603 | 1033 | 1591 | 1654 | 6617 | 6635 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off |
High Tide | 00:08AM0.62m | 2:14PM1.26m | 1:00AM0.65m | 2:40PM1.24m | 1:46AM0.69m | 3:05PM1.20m | 2:30AM0.73m | 3:28PM1.14m | 3:18AM0.77m | 3:49PM1.05m | 4:11AM0.80m | 4:02PM0.96m | 5:18AM0.83m | ||||||||
Low Tide | 10:01PM0.61m | 6:13AM0.37m | 10:02PM0.61m | 6:52AM0.39m | 10:07PM0.61m | 7:31AM0.41m | 10:15PM0.60m | 8:11AM0.45m | 10:25PM0.58m | 8:53AM0.51m | 10:38PM0.55m | 9:37AM0.59m | 10:53PM0.51m | 10:26AM0.68m | |||||||
 |  |  | |  | | |  |  | | |  |  |  | | | | | |  | | |
 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 |
 | 4:57 | — | — | 4:58 | — | — | 4:58 | — | — | 4:59 | — | — | 4:59 | — | — | 5:00 | — | — | 5:00 | — | 5:00 |
mm | 16 | 11 | 2 | 3 | 7 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 13 | 12 | 11 | 12 | 12 | 13 | 13 | 11 | 11 | 12 | 12 | 11 | 9 | 11 | 13 | 11 | 11 | 13 | 11 | 11 |
Feels °C | 9 | 5 | 3 | 0 | -1 | 3 | 7 | 8 | 5 | 5 | 7 | 7 | 6 | 4 | 6 | 9 | 7 | 8 | 10 | 7 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 14 | SW 13 | WSW 20 | — | — | SW 15 | SW 14 | SSW 11 | SSW 13 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SW 16 | SW 15 | SW 19 | SW 18 |
| kJ | 792 | 743 | 760 | 416 | — | — | 13567 | 6665 | 1658 | 4232 | 11148 | 13551 | 9261 | 5380 | 2606 | 1603 | 1033 | 1591 | 1654 | 6617 | 6635 |
Swell 2 Height (m) Direction Period (s) | WSW 10 | WSW 16 | W 16 | — | — | — | — | — | SW 14 | — | — | — | — | — | — | ESE 6 | SW 18 | — | SW 23 | — | — |
| kJ | 10 | 50 | 122 | — | — | — | — | — | 2125 | — | — | — | — | — | — | 17 | 197 | — | 262 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | ESE 6 | — | SSE 8 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | 40 | — | — |
Wind waves Height (m) Direction Period (s) | NW 8 | W 9 | W 10 | WSW 11 | WSW 17 | SW 16 | — | — | — | — | — | — | — | — | NNE 3 | N 4 | NNE 3 | — | — | — | — |
| kJ | 291 | 1228 | 2267 | 5022 | 35227 | 23858 | — | — | — | — | — | — | — | — | 6 | 6 | 3 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 28 | 707 | 553 | 294 | 794 | 779 | 412 | 310 | 310 | 464 | 332 | 128 | 464 | 0 | 9 | 0 | 9 | 0 | 0 | 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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