Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 22 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 11AM (local time) - 13ft (4.0m), 9s period, ESE swell with 2,539 kJ wave energy.
Best Forecast Surf Conditions for Nanwan Beach (South Bay) this week:
The most powerful waves expected at Nanwan Beach (South Bay) in the next 16 days are 4.0m 9s and forecast to arrive on Saturday (Jul 25) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 8s period and expected on Saturday (Jul 25) at 2AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sat 25th Jul) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.
Short Range ForecastHeavy rain (total 23mm), heaviest during Fri night. Warm (max 30°C on Thu afternoon, min 27°C on Fri night). Winds increasing (light winds from the WNW on Wed night, strong winds from the NE by Fri night). | Days 5-7 Weather SummaryHeavy rain (total 41mm), heaviest during Sat afternoon. Warm (max 29°C on Sun morning, min 27°C on Sat afternoon). Winds increasing (light winds from the ENE on Sat night, strong winds from the ENE by Mon night). | |||||||||||||||||||
Wed 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | ||||||||||||||
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) | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | E 17 | ESE 9 | SSW 9 | SW 9 | WSW 9 | WSW 8 | W 8 | E 6 | ESE 7 | SE 7 | SE 7 | SE 6 | SSW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 42 | 30 | 30 | 23 | 16 | 16 | 8 | 6 | 2539 | 1144 | 598 | 404 | 290 | 137 | 119 | 336 | 472 | 253 | 145 | 134 |
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 | cross-off | cross-off | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on |
High Tide | 1:33AM0.92m | 3:19PM0.48m | 2:28AM0.96m | 3:22AM1.01m | 4:12AM1.07m | 6:57PM0.52m | 4:58AM1.12m | 7:11PM0.53m | 5:40AM1.17m | 7:28PM0.54m | ||||||||||
Low Tide | 5:44PM0.44m | 9:54AM0.38m | 5:47PM0.47m | 11:05AM0.30m | 11:49AM0.23m | 12:24PM0.18m | 9:09PM0.50m | 12:56PM0.14m | 10:13PM0.47m | 1:27PM0.12m | 11:04PM0.43m | |||||||||
 |  | | | |  |  |  | |  | | | | | | | | | | | |
 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — |
 | 6:40 | — | — | 6:40 | — | — | 6:39 | — | — | 6:39 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — |
mm | — | — | — | — | — | — | 1 | 15 | 7 | 10 | 8 | 1 | 2 | 2 | 2 | 2 | 7 | 7 | 10 | 56 |
Temp °C | 29 | 29 | 29 | 30 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 27 | 26 |
Feels °C | 31 | 33 | 32 | 32 | 33 | 31 | 29 | 25 | 27 | 28 | 29 | 31 | 30 | 28 | 27 | 27 | 26 | 25 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | NE 10 | SW 7 | SW 7 | ESE 9 | SW 9 | WSW 9 | WSW 8 | W 8 | W 8 | SW 8 | SW 8 | SSW 8 | SSW 7 | SSW 7 |
| kJ | 42 | 30 | 30 | 23 | 16 | 16 | 27 | 2 | 2 | 893 | 598 | 404 | 290 | 137 | 43 | 46 | 62 | 72 | 134 | 134 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 10 | SW 7 | E 17 | E 16 | SW 9 | ESE 8 | SE 9 | ESE 8 | SW 7 | SW 7 | W 7 | ENE 9 | ESE 10 | SE 10 | SE 6 |
| kJ | 17 | 17 | 16 | 16 | 16 | 7 | 7 | 6 | 5 | 562 | 254 | 170 | 82 | 41 | 34 | 15 | 8 | 40 | 24 | 85 |
Swell 3 Height (m) Direction Period (s) | E 9 | E 9 | E 10 | E 10 | ENE 12 | SE 10 | E 10 | — | E 16 | S 8 | ENE 10 | ENE 10 | SE 10 | SE 8 | ESE 10 | ENE 9 | W 6 | ENE 9 | ENE 9 | SE 10 |
| kJ | 7 | 2 | 8 | 8 | 13 | 4 | 8 | — | 5 | 304 | 19 | 18 | 26 | 50 | 35 | 16 | 3 | 8 | 8 | 25 |
Wind waves Height (m) Direction Period (s) | W 2 | — | — | — | ENE 2 | ENE 5 | NE 6 | ENE 8 | ESE 9 | SSW 9 | — | — | — | ENE 4 | E 6 | ESE 7 | SE 7 | SE 7 | SE 6 | — |
| kJ | 1 | — | — | — | 1 | 56 | 120 | 1387 | 2539 | 1144 | — | — | — | 27 | 119 | 336 | 472 | 253 | 145 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 922 | 2 | 845 | 329 | 922 | 693 | 676 | 148 | 148 | 79 | 79 | 589 | 316 | 639 | 676 | 693 | 494 | 996 | 511 |
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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