Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 4 Aug 2026:
- Best quality surf: Sunday 9 Aug, 8AM (local time) - 11ft (3.5m), 9s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 8AM (local time) - 6ft (1.9m), 18s period, E swell with 2,222 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 2AM (local time) - 5ft (1.6m), 18s period with E swell.
Best Forecast Surf Conditions for Nanwan Beach (South Bay) this week:
The surf forecast for Nanwan Beach (South Bay) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 2AM. The primary swell is predicted to be 1.6m and 18s period with a secondary swell of 0.4m and 7s. Another secondary swell of 0.8m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Nanwan Beach (South Bay) in the next 16 days are 1.9m 18s and forecast to arrive on Wednesday (Aug 05) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 17s period and expected on Thursday (Aug 06) at 11PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 5th Aug) | 5ft (1.6m) 18s |
| Best Surf | 8AM (Sun 9th Aug) | 11ft (3.5m) 9s |
| Most Powerful | 8AM (Wed 5th Aug) | 6ft (1.9m) 18s |
Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.
Short Range ForecastMostly dry. Warm (max 29°C on Wed morning, min 27°C on Tue night). Winds increasing (calm on Wed night, strong winds from the WNW by Fri morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Sat afternoon, min 28°C on Fri night). Mainly strong winds. | ||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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) | E 18 | E 17 | E 17 | SSW 8 | SW 9 | WSW 8 | WSW 9 | SW 8 | W 6 | ENE 16 | WSW 7 | WSW 8 | WSW 8 | WSW 9 | SW 9 | SW 9 | SW 9 | SW 10 | SW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 1561 | 2196 | 2023 | 50 | 112 | 117 | 144 | 57 | 295 | 0 | 657 | 964 | 1138 | 1666 | 1696 | 1759 | 1965 | 1926 | 1996 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:43PM0.86m | 10:48AM0.72m | 11:31PM0.93m | 12:04PM0.58m | 00:31AM0.99m | 2:26PM0.49m | 1:43AM1.07m | 5:31PM0.49m | 2:58AM1.15m | 6:13PM0.51m | 4:05AM1.24m | 6:39PM0.52m | |||||||
Low Tide | 5:01AM0.38m | 4:40PM0.37m | 6:37AM0.37m | 5:03PM0.41m | 8:36AM0.31m | 5:28PM0.46m | 10:14AM0.20m | 6:01PM0.49m | 11:21AM0.09m | 8:02PM0.49m | 12:12PM0.02m | 9:36PM0.46m | |||||||
 |  |  | | | | | | | | | |  | | | | | |  | |
 | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — |
 | 6:35 | — | 6:34 | — | — | 6:34 | — | — | 6:32 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Temp °C | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
Feels °C | 31 | 33 | 33 | 33 | 32 | 31 | 33 | 27 | 26 | 28 | 28 | 28 | 27 | 29 | 28 | 30 | 29 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | E 18 | E 17 | E 17 | ENE 18 | ENE 18 | ENE 18 | ENE 17 | ENE 17 | ENE 17 | ENE 16 | NE 15 | NE 16 | NE 16 | NE 16 | NE 16 | NE 15 | NNE 16 | NE 15 | NNE 14 |
| kJ | 1561 | 2196 | 2023 | 2552 | 3511 | 4137 | 4731 | 5209 | 5428 | 2892 | 1540 | 1592 | 1494 | 1643 | 1366 | 1135 | 801 | 516 | 133 |
Swell 2 Height (m) Direction Period (s) | SW 7 | SW 7 | S 8 | SSW 8 | — | — | — | SW 8 | — | — | SE 10 | — | — | SSE 10 | SSE 10 | SE 11 | SE 10 | ENE 15 | ENE 14 |
| kJ | 12 | 11 | 12 | 50 | — | — | — | 57 | — | — | 4 | — | — | 11 | 11 | 18 | 16 | 43 | 68 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 9 | — | — | — | — | — | — | — | — | — | — | — | — | E 15 | ENE 15 | SE 10 | SE 10 |
| kJ | — | — | 13 | — | — | — | — | — | — | — | — | — | — | — | — | 17 | 22 | 16 | 17 |
Wind waves Height (m) Direction Period (s) | E 6 | — | W 6 | — | SW 9 | WSW 8 | WSW 9 | WNW 6 | W 6 | WSW 6 | WSW 7 | WSW 8 | WSW 8 | WSW 9 | SW 9 | SW 9 | SW 9 | SW 10 | SW 10 |
| kJ | 41 | — | 12 | — | 112 | 117 | 144 | 284 | 295 | 257 | 657 | 964 | 1138 | 1666 | 1696 | 1759 | 1965 | 1926 | 1996 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 2 | 2 | 0 | 148 | 676 | 676 | 148 | 442 | 42 | 148 | 390 | 42 | 148 | 316 | 316 | 148 |
Best forecast wave conditions in South Taiwan | |||||||||||||||||||
Best forecast wave conditions in Taiwan | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
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 Nanwan Beach (South Bay) 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 Nanwan Beach (South Bay) Surf forecast
The above surf forecast table for Nanwan Beach (South Bay) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nanwan Beach (South Bay) can be found by selecting the local surf guide option on the grey menu. Our Nanwan Beach (South Bay) 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 (Nanwan Beach (South Bay)) 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 Nanwan Beach (South Bay) 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.
Nearest