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Lighthouse-Southside surfForecast / Rhode Island / USA

information circle12 Day Weather and Surf, issued 1 pm Sunday 17 Aug 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Lighthouse-Southside surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Lighthouse-Southside sea temperature is
21.8° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Lighthouse-Southside this week:

The surf forecast for Lighthouse-Southside over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 19) at 5AM. The primary swell is predicted to be 0.6m and 12s period with a secondary swell of 0.4m and 16s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Lighthouse-Southside in the next 12 days are 3.5m 17s and forecast to arrive on Thursday (Aug 21) 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 1.6m 8s period and expected on Thursday (Aug 21) at 11PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 19th Aug)2ft (0.6m) 12s
Best Surf 2PM (Thu 21st Aug)10ft (3.0m) 17s
Most Powerful 5PM (Thu 21st Aug)11ft (3.5m) 17s

Table - best surf conditions forecast for Lighthouse-Southside over the next 12 days.

Hourly12 Days
Rhode Island Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 

Short Range Forecast Moderate rain (total 13mm), heaviest on Sun night. Warm (max 25°C on Sun afternoon, min 16°C on Mon night). Mainly fresh winds.

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Sat morning. Warm (max 23°C on Thu afternoon, min 16°C on Wed night). Winds increasing (light winds from the NW on Thu night, fresh winds from the SSW by Sat morning).

Sun
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
1
1
3
3
4
4
6
6
4
1
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.9
SSW
0.6
SSW
0.4
SSE
0.6
SSE
0.7
SE
0.9
SSE
0.9
SSE
1.4
SSE
1.9
SSE
2.2
SSE
2.5
SSE
3
S
3.5
S
2
SSE
1.4
SE
1.1
SE
0.7
SE
0.4
ESE
1.2
SSW
1.2
SSW
0.9
SSW
Period(s) (?)4513141315141615161617171412111111555
Wave
Graph
(?)Metric surfscale
Energy (?)56499513719438559814661560228137555691626115875923122061031179665
Wind
(km/h)
25
SSW
30
NE
30
NE
30
ENE
15
ENE
15
E
20
SE
15
SE
15
E
15
ESE
15
ENE
25
NE
25
ENE
10
NNW
15
WSW
30
SSW
30
SSW
30
SSW
30
SSW
25
SSW
15
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onoffoffcross-
off		cross-
off		cross-
off		crosscrosscross-
off		cross-
off		cross-
off		offoffcross-
off		onononcross-
on		oncross-
on		on
High Tide
/ height (m)
3:22PM
1.08
3:51AM
0.81
4:27PM
1.09
4:56AM
0.84
5:29PM
1.11
5:56AM
0.90
6:24PM
1.14
6:49AM
0.97
7:14PM
1.16
7:37AM
1.03
8:00PM
1.15
8:21AM
1.08
8:42PM
1.13
9:03AM
1.10
Low Tide
/ height (m)
10:14PM
0.13
9:54AM
0.10
11:26PM
0.09
11:13AM
0.07
12:24AM
0.04
12:18PM
0.02
1:12AM
-0.00
1:12PM
-0.02
1:54AM
-0.03
2:00PM
-0.05
2:32AM
-0.05
2:43PM
-0.05
3:06AM
-0.05
Sun
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunrise--5:56--5:58--5:58--6:00--6:01--6:01--6:03
Sunset7:42--7:40--7:39--7:37--7:37--7:35--7:32--
part cloudrain showerspart cloudclearclearclearclearpart cloudcloudclearclearclearclearclearpart cloudclearclearthunderstorm mod rainthunderstorm clear
Rain (mm)
-13---------------461-
Temp. °C252217191719191819201921232022232223232324
Feels °C (?)242211141215151517181716181621201921212125
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Rhode Island

  1. weather stationWind Update Wind reports 20 km away suggest it is still onshore at Lighthouse-Southside (fresh winds from the SSW at BUOY-NWPR1). 0.7m 4s local chop from the SSW with a 0.2m 10s swell from the SE. 2 swells combining to make bigger set waves.

    1 hour 21 minutes ago Lighthouse-Southside
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20 km away, 1 h 21 min ago

33 km/h
SSW
0.0
21.8
Air / Water (°C)
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

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.

View detailed surf forecast for Lighthouse-Southside at:
surf-forecast.com

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 12 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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