- Forecast
- Maps
- Live
- Weather State
- Spot Information
Cape Northumberland Surf Forecast
/ SA – East Coast (28 breaks) / South Australia (91 breaks) /
Surf Forecasts:
Cape Northumberland surfForecast / SA – East Coast / Australia
16 Day Weather and Surf, issued 2 am Sunday 17 May 2026 ACSTForecast update in hr min s Forecast update imminent
Cape Northumberland surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cape Northumberland sea temperature is
16.6° C
(Which is 1.4°C warmer than normal for this time of year)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 (May 17) at 6PM. The primary swell is predicted to be 2.4m and 14s 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 2.5m 16s and forecast to arrive on Thursday (May 21) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 17th May) | 8ft (2.4m) 14s |
| Best Surf | 6PM (Sun 17th May) | 8ft (2.4m) 14s |
| Most Powerful | 12AM (Thu 21st May) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Cape Northumberland over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Mon night. Very mild (max 15°C on Mon morning, min 12°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Wed morning. Very mild (max 14°C on Wed morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | WSW 11 | SW 11 | SW 10 | SW 10 | SW 16 | SW 16 | SW 14 | SW 14 | SW 12 | SW 13 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 | |
2630 | 2042 | 2094 | 1450 | 1131 | 869 | 508 | 918 | 783 | 677 | 929 | 2888 | 2724 | 2405 | 1290 | 1285 | 1639 | 1929 | 1319 | 1069 | 1338 | |
Wind (km/h) | |||||||||||||||||||||
cross | cross | off | cross | cross-on | cross | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | glassy | cross-off | cross-on | glassy | on | cross-on | cross | |
High Tide | 12:46PM1.22m | 10:35PM0.61m | 1:22PM1.23m | 1:58PM1.22m | 2:36PM1.19m | 3:13PM1.13m | 3:52PM1.06m | 4:33PM0.99m | |||||||||||||
Low Tide | 8:35PM0.60m | 5:16AM0.23m | 5:41AM0.19m | 6:11AM0.19m | 6:44AM0.22m | 7:19AM0.30m | 7:58AM0.41m | ||||||||||||||
 |  |  | |  |  | | | |  | | | | |  | | |  | |  | | |
 | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — |
 | — | 5:04 | — | — | 5:04 | — | — | 5:02 | — | — | 5:01 | — | — | 5:00 | — | — | 5:00 | — | — | 5:00 | — |
— | — | — | — | — | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | — | |
Temp °C | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 14 | 12 |
12 | 12 | 12 | 12 | 11 | 13 | 12 | 9 | 10 | 10 | 11 | 10 | 10 | 11 | 11 | 11 | 12 | 13 | 12 | 11 | 6 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | WSW 11 | SW 11 | SW 10 | SW 10 | SW 10 | SW 16 | SW 14 | SW 14 | SW 12 | SW 13 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 |
 kJ | 2630 | 2042 | 2094 | 1450 | 1131 | 869 | 508 | 918 | 783 | 667 | 910 | 2888 | 2724 | 2405 | 1290 | 1285 | 1639 | 1929 | 1319 | 1069 | 1338 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 24 | SW 23 | SW 21 | SW 20 | SSW 12 | SW 18 | SW 18 | SW 16 | SW 16 | — | — | — | — | — | — | — | — | — | SW 12 |
| kJ | — | — | 22 | 21 | 117 | 186 | 464 | 455 | 600 | 677 | 929 | — | — | — | — | — | — | — | — | — | 34 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 183 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 40 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 92 | 92 | 0 | 7 | 87 | 7 | 87 | 92 | 87 | 273 | 777 | 92 | 92 | 92 | 0 | 0 | 127 | 0 | 7 | 142 | 412 |
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