Surf Forecasts:
Charleston surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 12PM (local time) - 13ft (4.0m), 15s period, W swell with cross-onshore winds.
- Most powerful swell: Monday 24 Aug, 12PM (local time) - 13ft (4.0m), 15s period, W swell with 7,231 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 12PM (local time) - 13ft (4.0m), 15s period with W 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 Monday (Aug 24) at 12PM. The primary swell is predicted to be 4.0m and 15s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Charleston in the next 16 days are 4.0m 15s and forecast to arrive on Monday (Aug 24) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Friday (Aug 28) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 24th Aug) | 13ft (4.0m) 15s |
| Best Surf | 12PM (Mon 24th Aug) | 13ft (4.0m) 15s |
| Most Powerful | 12PM (Mon 24th Aug) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Charleston over the next 16 days.
Short Range ForecastHeavy rain (total 47mm), heaviest during Wed afternoon. Very mild (max 14°C on Wed morning, min 11°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 83mm), heaviest during Thu night. Very mild (max 14°C on Thu morning, min 10°C on Sat night). Mainly strong winds. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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) | W 15 | WSW 15 | WSW 15 | W 14 | W 14 | WSW 14 | WSW 14 | WSW 13 | W 13 | WSW 12 | NNW 7 | NW 10 | NNW 10 | NNW 9 | NW 9 | WNW 9 | WSW 20 | WSW 18 | WSW 16 | WSW 11 | WSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8296 | 6625 | 4279 | 4265 | 3606 | 3469 | 2582 | 2085 | 1609 | 876 | 587 | 2132 | 2523 | 1221 | 798 | 315 | 507 | 808 | 807 | 1205 | 1919 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | cross-on | on | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross-on |
High Tide | 8:20PM2.31m | 8:46AM2.33m | 9:05PM2.47m | 9:27AM2.47m | 9:44PM2.62m | 10:05AM2.61m | 10:20PM2.76m | 10:40AM2.72m | 10:54PM2.86m | 11:15AM2.80m | 11:29PM2.92m | 11:50AM2.84m | 00:05AM2.94m | ||||||||
Low Tide | 2:05PM0.83m | 2:35AM0.72m | 2:53PM0.68m | 3:18AM0.55m | 3:33PM0.52m | 3:57AM0.39m | 4:10PM0.38m | 4:32AM0.25m | 4:45PM0.26m | 5:07AM0.15m | 5:20PM0.18m | 5:42AM0.09m | 5:56PM0.15m | ||||||||
 | |  | |  | | |  |  | | | | | | | | | | | | | |
 | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — |
 | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — |
mm | 2 | 2 | 6 | 4 | 3 | 7 | 5 | 7 | 11 | 7 | 5 | 46 | 8 | 7 | 4 | 3 | 1 | 2 | 2 | 1 | 1 |
Temp °C | 12 | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 11 | 12 | 12 | 11 | 12 | 12 | 11 |
Feels °C | 8 | 8 | 8 | 8 | 9 | 11 | 12 | 11 | 13 | 11 | 9 | 8 | 8 | 9 | 8 | 9 | 6 | 5 | 5 | 5 | 5 |
Swell 1 Height (m) Direction Period (s) | W 15 | WSW 15 | WSW 15 | WSW 14 | W 14 | WSW 14 | WSW 14 | WSW 13 | W 13 | WSW 12 | W 10 | NW 10 | NNW 10 | NNW 9 | NW 9 | WNW 9 | W 8 | W 7 | WSW 16 | WSW 11 | WSW 15 |
| kJ | 8296 | 6625 | 4279 | 724 | 3606 | 3469 | 2582 | 2085 | 1609 | 876 | 379 | 2132 | 2523 | 1221 | 798 | 315 | 253 | 150 | 807 | 1205 | 543 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 20 | W 17 | WSW 12 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | NNW 8 | WSW 20 | WSW 18 | WSW 12 | WSW 16 | WSW 15 |
| kJ | — | — | — | — | — | — | — | — | 30 | 210 | 339 | 557 | 342 | 307 | 242 | 119 | 507 | 808 | 339 | 917 | 292 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 20 | WNW 8 | WSW 16 | — | W 24 | W 23 | WSW 22 | WSW 12 | N 8 | WSW 13 | — | N 7 | — |
| kJ | — | — | — | — | — | — | — | — | 7 | 14 | 203 | — | 11 | 41 | 98 | 164 | 74 | 195 | — | 4 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | W 14 | W 9 | — | — | — | — | NNW 7 | NNW 7 | NNE 7 | — | — | — | — | — | — | WSW 7 | — | WSW 10 |
| kJ | — | — | — | 4265 | 798 | — | — | — | — | 261 | 587 | 371 | — | — | — | — | — | — | 299 | — | 1919 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 166 | 184 | 23 | 184 | 184 | 179 | 179 | 166 | 26 | 63 | 186 | 179 | 179 | 51 | 158 | 23 | 179 | 179 | 186 | 224 | 184 |
Best forecast wave conditions in West Coast South Island | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 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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