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Cape Northumberland Surf Forecast
/ SA – East Coast (28 breaks) / South Australia (91 breaks) /
Surf Forecasts:
Cape Northumberland surfForecast / SA – East Coast / Australia
48hr Weather and Surf, issued 8 pm 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)How big are the waves at Cape Northumberland today?
The current surf forecast for Cape Northumberland at 11PM is: 2.5m 13s primary swell from a Southwest direction and 0.1m 24s secondary swell from a Southwest direction (forecast issued at 08:30pm May 17). The wind direction is predicted to be offshore and the swell rating is 4.
| Time (ACST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | - | - |
| Afternoon (17 May) | - | - |
| Evening (17 May) | 8ft (2.5m) | 13s |
Table - waves today at Cape Northumberland. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Very mild (max 15°C on Mon morning, min 12°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wednesday 20 | |||||||||||||||||||||
6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | WSW 11 | SW 11 | SW 11 | SW 11 | WSW 11 | SW 10 | SW 17 | SW 10 | SW 10 | SW 10 | SW 16 | |
2065 | 2281 | 2094 | 1915 | 1778 | 1450 | 1209 | 1131 | 1031 | 944 | 800 | 799 | 966 | 785 | 1151 | 1130 | 1109 | 1148 | 971 | 687 | 898 | 898 | 916 | 929 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | off | off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 10:35PM0.61m | 1:22PM1.23m | 1:58PM1.22m | 2:36PM1.19m | ||||||||||||||||||||
Low Tide | 8:35PM0.60m | 5:16AM0.23m | 5:41AM0.19m | 6:11AM0.19m | ||||||||||||||||||||
 | | | | |  | | | |  |  |  | |  |  | | | | |  | | | | | |
 | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:03 | — | — | — | — | — | — | — | 7:03 | — | — | — |
 | — | — | — | — | — | — | — | 5:04 | — | — | — | — | — | — | — | 5:02 | — | — | — | — | — | — | — | 5:01 |
— | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 1 | — | — | — | — | |
Temp °C | 14 | 14 | 13 | 12 | 12 | 12 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 14 |
11 | 12 | 11 | 10 | 10 | 10 | 12 | 11 | 12 | 12 | 12 | 11 | 10 | 9 | 8 | 8 | 9 | 10 | 10 | 9 | 10 | 11 | 13 | 11 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 19 | SW 11 | SSW 12 | SW 11 | SW 18 | SW 18 | SW 11 | SW 10 | SW 17 | SW 10 | SW 10 | SW 10 | SW 10 |
 kJ | 2065 | 2281 | 2094 | 1915 | 1778 | 1450 | 1209 | 1131 | 1031 | 944 | 800 | 303 | 966 | 429 | 1151 | 455 | 460 | 1089 | 971 | 687 | 898 | 898 | 916 | 901 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 24 | SW 24 | SW 24 | SW 23 | SSW 21 | SW 21 | SW 21 | SW 21 | SW 20 | SSW 12 | SSW 12 | SW 19 | SW 18 | — | — | SW 18 | SW 18 | SSW 10 | SW 17 | SW 16 | SW 16 | SW 16 |
| kJ | — | — | 22 | 22 | 22 | 21 | 45 | 117 | 72 | 71 | 186 | 83 | 117 | 183 | 323 | — | — | 460 | 600 | 216 | 737 | 776 | 834 | 929 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 20 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 186 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 4 | W 5 | SW 11 | — | WSW 11 | — | SW 11 | SW 11 | WSW 11 | — | WSW 10 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 6 | 24 | 799 | — | 785 | — | 1130 | 1109 | 1148 | — | 661 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 92 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 7 | 87 | 7 | 7 | 7 | 87 | 87 | 92 | 92 | 92 | 92 | 87 | 87 | 87 | 87 | 92 |
Best forecast wave conditions in South Australia - East Coast | ||||||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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