Surf Forecasts:
Lighthouse-Southside surf forecast from 19 Sep 2026:
- Best quality surf: Monday 21 Sep, 5PM (local time) - 3ft (0.9m), 6s period, ESE swell with offshore winds.
- Most powerful swell: Thursday 24 Sep, 5PM (local time) - 15ft (4.5m), 12s period, ESE swell with 4,732 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 5PM (local time) - 3ft (0.9m), 6s period with ESE swell.
Best Forecast Surf Conditions for Lighthouse-Southside this week:
The surf forecast for Lighthouse-Southside over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 21) at 5PM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.5m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Lighthouse-Southside in the next 16 days are 4.5m 12s and forecast to arrive on Thursday (Sep 24) at 5PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 7s period and expected on Thursday (Sep 24) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 21st Sep) | 3ft (0.9m) 6s |
| Best Surf | 5PM (Mon 21st Sep) | 3ft (0.9m) 6s |
| Most Powerful | 5PM (Thu 24th Sep) | 15ft (4.5m) 12s |
Table - best surf conditions forecast for Lighthouse-Southside over the next 16 days.
Short Range ForecastModerate rain (total 19mm), heaviest on Sun night. Very mild (max 19°C on Sun afternoon, min 13°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 32mm), heaviest during Thu night. Very mild (max 15°C on Wed morning, min 12°C on Tue afternoon). Winds increasing (moderate winds from the NE on Tue morning, near gales from the NNE by Thu night). | ||||||||||||||||||||
Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | |||||||||||||||
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) | SE 8 | SE 8 | ESE 7 | SE 11 | SE 10 | SE 8 | SE 8 | ESE 6 | E 7 | E 6 | S 14 | E 6 | E 7 | E 7 | E 9 | SE 10 | ESE 12 | ESE 10 | ESE 10 | SSE 9 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 11 | 16 | 5 | 18 | 17 | 11 | 25 | 61 | 107 | 162 | 4 | 0 | 380 | 532 | 1004 | 1204 | 4732 | 1360 | 643 | 544 | 128 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross | cross | cross-on | glassy | off | off | off | cross-off | off | off | off | off | off | off | off | cross-off | off | cross-off | cross-off |
High Tide | 2:40PM0.82m | 3:10AM0.67m | 3:42PM0.83m | 4:12AM0.72m | 4:38PM0.86m | 5:07AM0.79m | 5:29PM0.91m | 5:54AM0.87m | 6:14PM0.97m | 6:37AM0.97m | 6:56PM1.02m | 7:18AM1.05m | 7:37PM1.06m | ||||||||
Low Tide | 9:48PM0.30m | 8:51AM0.29m | 10:53PM0.27m | 10:30AM0.26m | 11:36PM0.21m | 11:27AM0.20m | 00:08AM0.14m | 12:10PM0.13m | 00:37AM0.07m | 12:48PM0.05m | 1:07AM0.01m | 1:25PM-0.01m | 1:37AM-0.05m | ||||||||
 | |  |  |  |  | | | |  | |  | | | | | | |  | | | |
 | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — |
 | — | 6:49 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:42 | — | — | 6:39 | — | — | 6:37 | — |
mm | — | — | — | — | 1 | 18 | — | — | — | 8 | 4 | — | — | — | — | — | 2 | 18 | 12 | 8 | 12 |
Temp °C | 16 | 17 | 16 | 17 | 19 | 18 | 14 | 16 | 15 | 13 | 13 | 13 | 15 | 15 | 15 | 14 | 15 | 13 | 12 | 12 | 11 |
Feels °C | 12 | 14 | 12 | 15 | 17 | 17 | 9 | 11 | 10 | 9 | 6 | 5 | 7 | 7 | 7 | 6 | 7 | 4 | 2 | 2 | 3 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | ESE 7 | SE 11 | SE 10 | SE 8 | SE 8 | ESE 6 | SE 7 | S 15 | S 14 | — | — | — | — | SE 10 | — | S 8 | ESE 10 | SSE 9 | SE 9 |
| kJ | 11 | 16 | 5 | 18 | 17 | 11 | 25 | 61 | 34 | 4 | 4 | — | — | — | — | 1204 | — | 86 | 643 | 544 | 128 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 11 | SE 11 | ESE 7 | ESE 7 | SSE 11 | SE 6 | E 6 | — | — | — | — | — | — | — | — | — | — | S 9 | ESE 10 | S 9 |
| kJ | 5 | 5 | 5 | 5 | 5 | 11 | 11 | 20 | — | — | — | — | — | — | — | — | — | — | 311 | 466 | 59 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 9 | — | — | E 6 | ESE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 7 |
| kJ | — | — | 3 | — | — | 1 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Wind waves Height (m) Direction Period (s) | ENE 5 | E 4 | ESE 4 | SE 4 | SE 4 | SE 4 | NE 4 | NE 4 | E 7 | E 6 | E 6 | E 6 | E 7 | E 7 | E 9 | ENE 6 | ESE 12 | ESE 10 | — | NNW 4 | WNW 4 |
| kJ | 24 | 12 | 5 | 6 | 13 | 19 | 21 | 17 | 107 | 162 | 121 | 136 | 380 | 532 | 1004 | 336 | 4732 | 1360 | — | 8 | 28 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1171 | 1171 | 872 | 173 | 1063 | 69 | 615 | 0 | 2 | 615 | 615 | 872 | 872 | 872 | 750 | 1012 | 1012 | 870 | 870 | 774 | 290 |
Best forecast wave conditions in Rhode Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Lighthouse-Southside 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 Lighthouse-Southside Surf forecast
The above surf forecast table for Lighthouse-Southside provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Lighthouse-Southside can be found by selecting the local surf guide option on the grey menu. Our Lighthouse-Southside 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 (Lighthouse-Southside) 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 Lighthouse-Southside 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.
Lighthouse-Southside is 8 km (5 miles) from Narragansett Pier. If you plan a vacation in Rhode Island, look for hotels and other accommodation in Narragansett Pier. Narragansett Pier has rooms for a wide range of budgets as well as car hire and transport links.
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