Surf Forecasts:
Charleston surf forecast from 5 Aug 2026:
- Best quality surf: Sunday 9 Aug, 3AM (local time) - 11ft (3.5m), 10s period, NNW swell with cross-onshore winds.
- Most powerful swell: Sunday 9 Aug, 9AM (local time) - 13ft (4.0m), 10s period, NW swell with 2,721 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9AM (local time) - 2.5ft (0.7m), 12s period with WSW swell.
Best Forecast Surf Conditions for Charleston this week:
The surf forecast for Charleston over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 06) at 9AM. The primary swell is predicted to be 0.7m and 12s period with a secondary swell of 0.4m and 14s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Charleston in the next 16 days are 4.0m 10s and forecast to arrive on Sunday (Aug 09) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 9s period and expected on Sunday (Aug 09) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Thu 6th Aug) | 2.5ft (0.7m) 12s |
| Best Surf | 3AM (Sun 9th Aug) | 11ft (3.5m) 10s |
| Most Powerful | 9AM (Sun 9th Aug) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Charleston over the next 16 days.
Short Range ForecastHeavy rain (total 28mm), heaviest during Sat morning. Very mild (max 13°C on Sat afternoon, min 5°C on Wed night). Winds increasing (calm on Thu afternoon, fresh winds from the NNE by Sat afternoon). | Days 5-7 Weather SummaryHeavy rain (total 31mm), heaviest during Sat night. Very mild (max 12°C on Sat night, min 9°C on Sun night). Winds decreasing (fresh winds from the NE on Sat night, calm by Tue afternoon). | ||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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) | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WNW 10 | NW 10 | NW 9 | NNW 8 | NNW 8 | WSW 15 | NW 10 | W 9 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 19 | WSW 18 |
Wave Graph  | |||||||||||||||||||
 kJ | 222 | 123 | 98 | 96 | 520 | 906 | 560 | 500 | 458 | 376 | 2721 | 791 | 1096 | 1174 | 1016 | 651 | 395 | 367 | 438 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-off | glassy | cross-on | cross-off | off | glassy | cross-off |
High Tide | 3:24AM2.53m | 3:57PM2.44m | 4:28AM2.44m | 5:05PM2.39m | 5:43AM2.40m | 6:21PM2.42m | 7:01AM2.45m | 7:34PM2.54m | 8:12AM2.57m | 8:38PM2.72m | 9:12AM2.73m | 9:34PM2.90m | |||||||
Low Tide | 9:13PM0.51m | 9:44AM0.52m | 10:13PM0.60m | 10:48AM0.61m | 11:23PM0.63m | 12:01PM0.64m | 00:40AM0.59m | 1:15PM0.58m | 1:52AM0.45m | 2:21PM0.44m | 2:55AM0.27m | 3:19PM0.28m | |||||||
 |  |  |  |  |  |  |  |  |  | | | | | | | | | | |
 | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — |
 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — |
mm | — | — | — | — | — | 4 | 2 | 18 | 4 | 28 | 1 | 2 | — | — | — | — | — | — | 1 |
Temp °C | 5 | 8 | 8 | 8 | 9 | 9 | 11 | 11 | 13 | 12 | 12 | 12 | 10 | 12 | 12 | 10 | 12 | 12 | 11 |
Feels °C | 2 | 5 | 6 | 3 | 4 | 5 | 8 | 7 | 8 | 9 | 10 | 10 | 8 | 11 | 9 | 8 | 10 | 11 | 8 |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WNW 10 | NW 10 | NW 9 | WSW 16 | NNW 8 | NNW 9 | WSW 13 | W 9 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | N 9 | N 8 |
| kJ | 222 | 123 | 98 | 96 | 520 | 906 | 560 | 144 | 458 | 1245 | 506 | 791 | 1096 | 1174 | 1016 | 651 | 378 | 162 | 143 |
Swell 2 Height (m) Direction Period (s) | WSW 15 | WSW 14 | WNW 7 | WNW 8 | WSW 13 | SW 13 | WSW 13 | WSW 12 | WSW 18 | WSW 15 | WSW 18 | NNW 9 | NNW 9 | NNW 9 | NNW 10 | N 10 | N 9 | WSW 13 | WSW 18 |
| kJ | 43 | 63 | 10 | 20 | 70 | 44 | 62 | 57 | 326 | 376 | 413 | 619 | 308 | 222 | 426 | 267 | 168 | 235 | 438 |
Swell 3 Height (m) Direction Period (s) | W 8 | WNW 7 | WSW 21 | WSW 20 | N 12 | W 19 | WSW 18 | WSW 20 | WSW 14 | WSW 19 | — | WSW 14 | WSW 7 | W 6 | W 26 | WSW 23 | WSW 20 | WSW 19 | WSW 12 |
| kJ | 5 | 10 | 42 | 37 | 3 | 7 | 32 | 75 | 111 | 289 | — | 415 | 161 | 44 | 13 | 100 | 395 | 367 | 83 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 3 | — | ENE 3 | NNW 8 | — | — | NW 10 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 3 | — | 2 | 500 | — | — | 2721 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 26 | 0 | 24 | 26 | 63 | 14 | 26 | 0 | 0 | 15 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in West Coast South Island | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
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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 Charleston 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 Charleston Surf forecast
The above surf forecast table for Charleston provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Charleston can be found by selecting the local surf guide option on the grey menu. Our Charleston 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 (Charleston) 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 Charleston 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.
Charleston is 167 km (104 miles) from the city of Nelson. If you plan a holiday in West Coast South Island, look for hotels and other accommodation in Nelson. Nelson has rooms for a wide range of budgets as well as car hire and transport links.
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