Surf Forecasts:
Goolwa Rivermouth surf forecast from 18 Sep 2026:
- Best quality surf: Monday 21 Sep, 3PM (local time) - 10ft (3.0m), 14s period, SSW swell with cross-onshore winds.
- Most powerful swell: Monday 21 Sep, 6PM (local time) - 10ft (3.0m), 14s period, SSW swell with 3,789 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 6PM (local time) - 4.5ft (1.4m), 16s period with SSW swell.
Best Forecast Surf Conditions for Goolwa Rivermouth this week:
The surf forecast for Goolwa Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 6PM. The primary swell is predicted to be 1.4m and 16s period with a secondary swell of 0.5m and 4s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Goolwa Rivermouth in the next 16 days are 3.0m 14s and forecast to arrive on Monday (Sep 21) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Sunday (Sep 20) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 18th Sep) | 4.5ft (1.4m) 16s |
| Best Surf | 3PM (Mon 21st Sep) | 10ft (3.0m) 14s |
| Most Powerful | 6PM (Mon 21st Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Goolwa Rivermouth over the next 16 days.
Short Range ForecastMostly dry. Warm (max 23°C on Sat night, min 12°C on Sun night). Winds increasing (light winds from the NW on Fri afternoon, strong winds from the NW by Sun morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Wed afternoon, min 6°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||
AM | 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) | SSW 17 | SSW 16 | SW 14 | SW 13 | SW 13 | SW 12 | SSW 16 | SW 15 | SW 14 | SW 16 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SW 13 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1626 | 1155 | 676 | 503 | 380 | 181 | 822 | 869 | 1665 | 3383 | 3531 | 3545 | 2729 | 2881 | 2513 | 1351 | 929 | 700 | 599 | 501 | 405 |
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 | off | cross-off | cross | on | cross-on | cross-on | cross | cross-off | cross-off | off | off | cross-off | cross-off | cross-on | on | cross-off |
High Tide | 6:13AM0.69m | 7:44AM0.65m | 10:34AM0.65m | 11:45AM0.70m | 3:24AM0.36m | 12:29PM0.73m | 2:27AM0.39m | 1:04PM0.73m | 2:20AM0.45m | ||||||||||||
Low Tide | 9:19PM0.07m | 9:05PM0.08m | 8:39PM0.08m | 8:17PM0.08m | 8:10PM0.07m | 4:54AM0.36m | 8:12PM0.06m | 6:22AM0.30m | 8:17PM0.07m | ||||||||||||
 | |  | | | | |  |  | | | | | | | | | | | | | |
 | 6:11 | — | — | 6:09 | — | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — | 6:01 | — | — |
 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 18 | 22 | 22 | 23 | 22 | 18 | 14 | 12 | 12 | 11 | 13 | 17 | 16 | 22 | 23 | 21 | 18 | 16 | 15 |
Feels °C | 13 | 14 | 14 | 17 | 17 | 14 | 12 | 12 | 10 | 6 | 7 | 6 | 8 | 12 | 11 | 19 | 18 | 15 | 15 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SW 14 | SW 13 | SW 13 | SW 12 | SSW 16 | SW 15 | — | SW 16 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SW 13 | SW 13 |
| kJ | 1626 | 1155 | 676 | 503 | 380 | 181 | 822 | 869 | — | 3383 | 3531 | 3545 | 2729 | 2881 | 2513 | 1351 | 929 | 700 | 599 | 501 | 405 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 19 | SW 20 | SSW 15 | SSW 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 3 |
| kJ | — | — | — | 15 | 15 | 152 | 447 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 19 | SW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 7 | 84 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | W 4 | — | NW 3 | — | NNE 3 | WNW 5 | W 5 | SW 14 | — | — | — | E 4 | — | — | NE 4 | — | NE 3 | NNE 3 | WNW 4 | NW 3 |
| kJ | 4 | 7 | — | 2 | — | 2 | 67 | 42 | 1665 | — | — | — | 9 | — | — | 15 | — | 4 | 7 | 11 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 17 | 0 | 0 | 10 | 0 | 561 | 562 | 185 | 155 | 155 | 182 | 19 | 182 | 15 | 0 | 10 | 0 | 17 | 155 | 0 |
Best forecast wave conditions in South Australia - East Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Goolwa Rivermouth Surf forecast
The above surf forecast table for Goolwa Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Goolwa Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Goolwa Rivermouth 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 (Goolwa Rivermouth) 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 Goolwa Rivermouth 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.
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