Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 2 Aug 2026:
- Best quality surf: Saturday 8 Aug, 5PM (local time) - 11ft (3.5m), 9s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 8AM (local time) - 18ft (5.5m), 11s period, SW swell with 7,203 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 5AM (local time) - 2ft (0.6m), 17s 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 Monday (Aug 03) at 5AM. The primary swell is predicted to be 0.6m and 17s period with a secondary swell of 0.6m and 7s. 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 5.5m 11s and forecast to arrive on Monday (Aug 10) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 18s period and expected on Thursday (Aug 06) at 2PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 3rd Aug) | 2ft (0.6m) 17s |
| Best Surf | 5PM (Sat 8th Aug) | 11ft (3.5m) 9s |
| Most Powerful | 8AM (Mon 10th Aug) | 18ft (5.5m) 11s |
Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.
Short Range ForecastMostly dry. Warm (max 30°C on Mon afternoon, min 27°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu night. Warm (max 30°C on Sat morning, min 28°C on Thu morning). Winds increasing (light winds from the WNW on Thu night, near gales from the W by Sat night). | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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) | E 15 | E 16 | E 16 | E 16 | E 16 | E 18 | E 17 | W 6 | ENE 18 | WSW 8 | WSW 8 | SW 10 | SW 9 | SW 9 | WSW 6 | WSW 8 | WSW 9 | SW 9 | WSW 10 | SW 11 | SW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 225 | 412 | 705 | 822 | 1106 | 1759 | 2196 | 21 | 0 | 74 | 109 | 137 | 178 | 216 | 347 | 1017 | 1941 | 3107 | 4552 | 4840 | 6277 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | off | glassy | 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 | 9:16AM0.99m | 10:03PM0.79m | 9:57AM0.86m | 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 | |||||||
Low Tide | 3:56PM0.26m | 3:48AM0.37m | 4:18PM0.31m | 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 | ||||||||
 |  |  | | | | | | | | |  | | |  | | | |  | | | |
 | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — |
 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:34 | — | — | 6:32 | — | — | 6:32 | — | — | 6:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | — | 1 |
Temp °C | 29 | 30 | 28 | 29 | 30 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 31 |
Feels °C | 31 | 31 | 31 | 31 | 33 | 33 | 33 | 32 | 34 | 31 | 31 | 33 | 27 | 26 | 29 | 28 | 28 | 29 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | E 15 | E 16 | E 16 | E 16 | E 16 | E 18 | E 17 | ENE 17 | ENE 18 | ENE 18 | ENE 18 | ENE 18 | ENE 17 | ENE 17 | NE 16 | NE 16 | NE 16 | NE 16 | NE 16 | NE 15 | NNE 15 |
| kJ | 225 | 412 | 705 | 822 | 1106 | 1759 | 2196 | 2086 | 3304 | 4524 | 5495 | 5221 | 5016 | 4423 | 1611 | 1464 | 1948 | 1300 | 1018 | 544 | 142 |
Swell 2 Height (m) Direction Period (s) | WSW 7 | SW 7 | E 6 | WSW 7 | E 6 | ESE 6 | SW 6 | SE 9 | NE 19 | — | — | SW 10 | SW 9 | SW 9 | — | — | — | SE 10 | SE 11 | SSE 11 | SSE 11 |
| kJ | 35 | 26 | 42 | 18 | 31 | 15 | 10 | 12 | 122 | — | — | 137 | 178 | 216 | — | — | — | 4 | 4 | 11 | 12 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | WSW 7 | E 8 | SW 7 | SW 7 | — | — | — | — | — | — | — | — | — | — | — | — | E 15 | E 15 | E 15 |
| kJ | 3 | 3 | 19 | 6 | 12 | 11 | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | E 6 | E 5 | NNE 3 | E 6 | — | — | WSW 6 | W 6 | — | WSW 8 | WSW 8 | WNW 5 | WNW 6 | WNW 6 | WSW 6 | WSW 8 | WSW 9 | SW 9 | WSW 10 | SW 11 | SW 10 |
| kJ | 60 | 56 | 3 | 32 | — | — | 14 | 21 | — | 74 | 109 | 54 | 188 | 130 | 347 | 1017 | 1941 | 3107 | 4552 | 4840 | 6277 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 378 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 676 | 2 | 148 | 442 | 148 | 42 | 538 | 42 | 148 | 148 | 148 | 148 |
Best forecast wave conditions in South Taiwan | |||||||||||||||||||||
Best forecast wave conditions in Taiwan | |||||||||||||||||||||
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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.
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