Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 13 Jun 2026:
- Best quality surf: Monday 15 Jun, 11AM (local time) - 3.5ft (1.1m), 7s period, WSW swell with offshore winds.
- Most powerful swell: Tuesday 16 Jun, 5PM (local time) - 4.5ft (1.3m), 8s period, SW swell with 186 kJ wave energy.
- Next surfable swell (1★+): Monday 15 Jun, 11AM (local time) - 3.5ft (1.1m), 7s period with WSW 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 (Jun 15) at 11AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.3m and 5s. Another secondary swell of 0.2m and 9s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Nanwan Beach (South Bay) in the next 16 days are 1.3m 8s and forecast to arrive on Tuesday (Jun 16) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 7s period and expected on Monday (Jun 15) at 2AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 15th Jun) | 3.5ft (1.1m) 7s |
| Best Surf | 11AM (Mon 15th Jun) | 3.5ft (1.1m) 7s |
| Most Powerful | 5PM (Tue 16th Jun) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 14mm), heaviest on Sun afternoon. Warm (max 28°C on Sat afternoon, min 25°C on Mon afternoon). Winds decreasing (fresh winds from the NW on Sun night, light winds from the WNW by Mon night). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Tue night. Warm (max 29°C on Tue afternoon, min 27°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Sat 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 7 | SW 6 | SW 4 | SW 5 | SSW 5 | WSW 7 | WSW 7 | WSW 7 | WSW 8 | SW 8 | WSW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SW 7 | WSW 7 | SW 7 | WSW 7 | WSW 7 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 24 | 26 | 24 | 19 | 132 | 156 | 125 | 154 | 186 | 154 | 136 | 140 | 126 | 107 | 107 | 96 | 79 | 93 | 93 | 111 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:14PM0.62m | 5:20AM1.30m | 7:16PM0.57m | 6:07AM1.38m | 8:12PM0.53m | 6:56AM1.42m | 9:05PM0.50m | 7:47AM1.41m | 9:55PM0.48m | 8:39AM1.35m | 10:46PM0.49m | 9:32AM1.24m | 11:38PM0.53m | 10:25AM1.11m | |||||||
Low Tide | 10:22PM0.43m | 12:59PM-0.04m | 10:59PM0.43m | 1:55PM-0.09m | 11:38PM0.42m | 2:49PM-0.09m | 00:20AM0.40m | 3:43PM-0.04m | 1:07AM0.40m | 4:36PM0.03m | 2:00AM0.41m | 5:25PM0.11m | 3:05AM0.45m | ||||||||
 |  |  | |  |  |  |  | |  |  | | |  |  | | | | | | | |
 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 |
 | 6:39 | — | — | 6:40 | — | — | 6:40 | — | — | 6:40 | — | — | 6:42 | — | — | 6:42 | — | — | 6:42 | — | 6:42 |
mm | — | 2 | 3 | 5 | 1 | — | 3 | — | — | 1 | 6 | — | 2 | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 28 | 28 | 27 | 27 | 26 | 27 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 29 | 28 | 28 |
Feels °C | 30 | 29 | 30 | 29 | 27 | 28 | 29 | 29 | 32 | 32 | 32 | 32 | 30 | 30 | 31 | 31 | 31 | 30 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 7 | NE 7 | SW 5 | SSW 5 | SE 5 | WSW 7 | WSW 7 | WSW 8 | SE 5 | WSW 8 | SW 8 | SE 6 | SE 6 | SW 7 | SE 5 | SE 5 | SW 7 | SE 10 | SE 10 | SE 10 |
| kJ | 23 | 18 | 12 | 24 | 19 | 5 | 156 | 125 | 154 | 5 | 154 | 136 | 16 | 11 | 107 | 4 | 6 | 79 | 28 | 25 | 25 |
Swell 2 Height (m) Direction Period (s) | SW 7 | ESE 6 | ESE 9 | ENE 7 | SE 6 | E 9 | SE 6 | SE 6 | E 9 | E 10 | SE 6 | SE 6 | ENE 9 | E 9 | SE 5 | E 9 | E 9 | SE 10 | E 9 | E 9 | E 9 |
| kJ | 15 | 4 | 8 | 4 | 5 | 7 | 5 | 5 | 6 | 8 | 8 | 17 | 7 | 6 | 10 | 15 | 15 | 28 | 15 | 15 | 15 |
Swell 3 Height (m) Direction Period (s) | ESE 6 | E 9 | SE 6 | ESE 9 | E 9 | NE 7 | E 9 | E 9 | NE 9 | NE 8 | ENE 9 | ENE 8 | E 9 | ENE 8 | E 9 | ESE 10 | ESE 10 | E 9 | ESE 5 | SE 4 | NE 8 |
| kJ | 4 | 2 | 1 | 8 | 6 | 2 | 6 | 6 | 3 | 3 | 7 | 7 | 7 | 7 | 14 | 9 | 9 | 15 | 2 | 1 | 3 |
Wind waves Height (m) Direction Period (s) | W 2 | SW 6 | SW 4 | W 4 | W 7 | WSW 7 | — | — | SE 5 | SW 8 | — | — | SW 7 | SW 7 | — | SW 7 | WSW 7 | WSW 3 | WSW 7 | WSW 7 | WSW 7 |
| kJ | 1 | 24 | 26 | 24 | 89 | 132 | — | — | 4 | 186 | — | — | 140 | 126 | — | 107 | 96 | 2 | 93 | 93 | 111 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 316 | 329 | 329 | 348 | 0 | 0 | 0 | 538 | 316 | 14 | 14 | 14 | 14 | 2 | 14 | 451 | 451 | 451 | 845 | 1254 |
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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