Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 23 Jun 2026:
- Best quality surf: Friday 26 Jun, 11PM (local time) - 6ft (1.8m), 7s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 24 Jun, 5AM (local time) - 8ft (2.5m), 13s period, ESE swell with 2,187 kJ wave energy.
- Next surfable swell (1★+): Friday 26 Jun, 11PM (local time) - 6ft (1.8m), 7s period with SW 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 Friday (Jun 26) at 11PM. The primary swell is predicted to be 1.8m and 7s period. 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 2.5m 13s and forecast to arrive on Wednesday (Jun 24) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Wednesday (Jun 24) at 2PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Fri 26th Jun) | 6ft (1.8m) 7s |
| Best Surf | 11PM (Fri 26th Jun) | 6ft (1.8m) 7s |
| Most Powerful | 5AM (Wed 24th Jun) | 8ft (2.5m) 13s |
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 ForecastHeavy rain (total 20mm), heaviest during Thu morning. Warm (max 29°C on Tue night, min 27°C on Fri morning). Winds increasing (light winds from the NW on Tue night, strong winds from the W by Thu morning). | Days 5-7 Weather SummaryHeavy rain (total 117mm), heaviest during Sat night. Warm (max 29°C on Mon morning, min 25°C on Sat morning). Winds decreasing (fresh winds from the SSW on Sat night, calm by Sun night). | ||||||||||||||||||||
Wednesday 24 | Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tue 30 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ESE 13 | ESE 12 | ESE 12 | E 11 | WSW 7 | WSW 7 | WSW 7 | SW 7 | WSW 8 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | E 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2417 | 1573 | 1180 | 701 | 360 | 371 | 286 | 273 | 226 | 269 | 189 | 119 | 183 | 184 | 160 | 107 | 91 | 67 | 67 | 57 | 48 |
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 | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross | cross | cross-off | glassy | cross-on | on | cross-on | on | on |
High Tide | 2:48AM0.87m | 3:17PM0.59m | 3:25AM0.96m | 4:41PM0.55m | 4:01AM1.03m | 5:48PM0.54m | 4:37AM1.09m | 6:38PM0.53m | 5:13AM1.14m | 7:16PM0.53m | 5:50AM1.17m | 7:49PM0.53m | 6:28AM1.20m | ||||||||
Low Tide | 9:55AM0.40m | 8:11PM0.44m | 11:00AM0.32m | 8:39PM0.46m | 11:48AM0.24m | 9:11PM0.47m | 12:27PM0.18m | 9:48PM0.48m | 1:04PM0.13m | 10:28PM0.47m | 1:40PM0.11m | 11:07PM0.45m | 2:16PM0.11m | ||||||||
 |  |  | | | | | | | |  |  | | | |  | | | |  | | |
 | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — |
 | 6:43 | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 |
mm | 1 | — | 1 | 3 | 4 | 5 | 3 | 1 | 2 | 9 | 9 | 32 | 46 | 19 | 2 | — | — | — | 3 | — | — |
Temp °C | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 26 | 25 | 26 | 26 | 27 | 27 | 29 | 29 | 29 | 29 | 30 |
Feels °C | 32 | 29 | 28 | 29 | 27 | 26 | 28 | 29 | 28 | 30 | 27 | 26 | 26 | 29 | 30 | 32 | 32 | 32 | 32 | 32 | 33 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 12 | ESE 12 | E 11 | E 11 | ENE 10 | ENE 9 | NE 9 | SSW 7 | NE 9 | NE 9 | SW 7 | SW 7 | SW 7 | E 9 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 8 |
| kJ | 2417 | 1573 | 1180 | 701 | 326 | 176 | 94 | 88 | 111 | 62 | 37 | 119 | 183 | 184 | 40 | 107 | 91 | 67 | 67 | 57 | 45 |
Swell 2 Height (m) Direction Period (s) | W 5 | NE 11 | NE 10 | N 10 | SE 10 | SE 8 | SE 10 | SE 8 | ENE 9 | ESE 11 | ESE 10 | S 6 | NE 4 | E 9 | NE 8 | E 8 | SE 4 | SE 4 | SE 5 | ESE 10 | E 10 |
| kJ | 25 | 4 | 4 | 2 | 33 | 11 | 23 | 10 | 53 | 11 | 20 | 52 | 7 | 43 | 10 | 22 | 6 | 5 | 6 | 18 | 48 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | NE 10 | S 8 | N 8 | ESE 10 | SSE 7 | SE 7 | NNE 7 | NE 9 | ESE 10 | NE 8 | ESE 10 | SE 10 | SE 10 | E 8 | E 8 | E 8 | E 15 |
| kJ | — | — | — | — | 4 | 5 | 1 | 10 | 5 | 2 | 5 | 29 | 31 | 9 | 11 | 25 | 23 | 12 | 11 | 10 | 4 |
Wind waves Height (m) Direction Period (s) | — | W 5 | W 6 | WSW 6 | WSW 7 | WSW 7 | WSW 7 | SW 7 | WSW 8 | SW 7 | SW 7 | — | — | — | SW 7 | SE 6 | — | — | — | SE 5 | SE 5 |
| kJ | — | 90 | 149 | 188 | 360 | 371 | 286 | 273 | 226 | 269 | 189 | — | — | — | 160 | 1 | — | — | — | 6 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 42 | 42 | 42 | 42 | 42 | 42 | 2 | 42 | 0 | 42 | 42 | 14 | 2 | 2 | 0 | 14 | 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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