Surf Forecasts:
Long Beach surf forecast from 18 Sep 2026:
- Best quality surf: Monday 21 Sep, 6AM (local time) - 11ft (3.5m), 16s period, SW swell with cross-shore winds.
- Most powerful swell: Monday 21 Sep, 3PM (local time) - 13ft (4.0m), 14s period, SW swell with 6,656 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 6AM (local time) - 11ft (3.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Long Beach this week:
The surf forecast for Long Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 21) at 6AM. The primary swell is predicted to be 3.5m and 16s period with a secondary swell of 3.0m and 12s. Another secondary swell of 1.9m and 16s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Long Beach in the next 16 days are 4.0m 14s and forecast to arrive on Monday (Sep 21) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 5s period and expected on Wednesday (Sep 23) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 21st Sep) | 11ft (3.5m) 16s |
| Best Surf | 6AM (Mon 21st Sep) | 11ft (3.5m) 16s |
| Most Powerful | 3PM (Mon 21st Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Long Beach over the next 16 days.
Short Range ForecastMostly dry. Warm (max 20°C on Sat night, min 10°C on Sun night). Winds increasing (light winds from the NNW on Sat afternoon, strong winds from the NNW by Sun morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Wed afternoon, min 8°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) | SW 17 | SW 16 | WSW 14 | WSW 13 | WSW 13 | SW 15 | SW 16 | SW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | WSW 13 | WSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2947 | 2185 | 2234 | 1725 | 1295 | 623 | 1761 | 1521 | 3772 | 5554 | 6656 | 6001 | 5403 | 3371 | 4351 | 2424 | 1527 | 1251 | 1089 | 1045 | 737 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-on | on | cross-on | cross | cross | off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | on | cross | cross-off |
High Tide | 1:22PM0.08m | 3:40AM0.10m | 1:06PM0.08m | 4:20AM0.08m | 11:30AM0.09m | 11:21AM0.10m | 00:41AM0.05m | 11:27AM0.11m | 11:53PM0.06m | 11:43AM0.11m | 11:54PM0.07m | ||||||||||
Low Tide | 8:14PM0.00m | 8:57AM0.07m | 8:27PM0.01m | 8:23AM0.08m | 8:32PM0.02m | 8:09PM0.03m | 7:16PM0.03m | 4:01AM0.04m | 6:45PM0.03m | 4:52AM0.03m | 6:31PM0.03m | ||||||||||
 | |  | | | |  | |  | | | | | | |  | | | | | | |
 | 6:07 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — |
 | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 16 | 17 | 17 | 19 | 20 | 18 | 15 | 13 | 12 | 12 | 10 | 12 | 14 | 14 | 16 | 17 | 16 | 16 | 15 | 14 |
Feels °C | 8 | 11 | 11 | 12 | 15 | 15 | 9 | 9 | 7 | 6 | 6 | 5 | 8 | 12 | 10 | 10 | 13 | 10 | 15 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | WSW 14 | WSW 13 | WSW 13 | SW 15 | SW 16 | SW 14 | SW 15 | SW 14 | SW 14 | SW 14 | SW 15 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | WSW 13 | WSW 13 |
| kJ | 2947 | 2185 | 2234 | 1725 | 1295 | 623 | 1761 | 1521 | 847 | 5554 | 6656 | 6001 | 5403 | 3371 | 4351 | 2424 | 1527 | 1251 | 1089 | 1045 | 737 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 20 | SW 19 | W 8 | — | — | SW 18 | — | — | — | — | WSW 14 | — | — | — | — | — | — | NW 4 |
| kJ | — | — | — | 60 | 95 | 133 | — | — | 258 | — | — | — | — | 2546 | — | — | — | — | — | — | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 330 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 4 | WNW 5 | NNW 5 | — | — | — | NW 6 | W 7 | WSW 14 | — | — | — | — | — | — | — | NW 5 | — | — | — | — |
| kJ | 20 | 69 | 21 | — | — | — | 169 | 233 | 3772 | — | — | — | — | — | — | — | 6 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 203 | 203 | 194 | 194 | 202 | 42 | 399 | 399 | 349 | 289 | 289 | 5 | 56 | 0 | 42 | 42 | 0 | 0 | 42 | 289 | 0 |
Best forecast wave conditions in South Australia - East Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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 Long Beach 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 Long Beach Surf forecast
The above surf forecast table for Long Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Long Beach can be found by selecting the local surf guide option on the grey menu. Our Long Beach 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 (Long Beach) 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 Long Beach 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.
Are you planning a holiday in South Australia - East Coast? If you are looking for accommodation near Long Beach, camping, hotels and holiday cottages in South Australia - East Coast, consider staying in Mount Gambier which is 115 km (71 miles) away.
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