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Surf Forecasts:

Winthrop Jetty surf break

Winthrop Jetty surfForecast / Massachusetts / USA

information circle12 Day Weather and Surf, issued 7 am Wednesday 20 Aug 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Winthrop Jetty surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Winthrop Jetty sea temperature is
19.9° C
 (Which is slightly cooler than normal)

Best Forecast Surf Conditions for Winthrop Jetty this week:

The surf forecast for Winthrop Jetty over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 22) at 11PM. The primary swell is predicted to be 1.4m and 10s period with a secondary swell of 1.0m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Winthrop Jetty in the next 12 days are 1.6m 18s and forecast to arrive on Friday (Aug 22) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Saturday (Aug 23) at 11PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 22nd Aug)4.5ft (1.4m) 10s
Best Surf11PM (Fri 22nd Aug)4.5ft (1.4m) 10s
Most Powerful 5AM (Fri 22nd Aug)5ft (1.6m) 18s

Table - best surf conditions forecast for Winthrop Jetty over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Moderate rain (total 12mm), heaviest on Wed night. Warm (max 22°C on Fri afternoon, min 13°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Mon night. Warm (max 29°C on Sat afternoon, min 19°C on Sat morning). Wind will be generally light.

Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tuesday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
0
0
0
2
1
2
3
3
0
1
1
0
0
0
0
0
1
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.3
ESE
0.4
ESE
0.4
ESE
0.6
ESE
0.7
ESE
1.2
E
1.9
ENE
1.8
E
1.7
E
1.5
E
1.4
E
1.1
E
1
E
0.8
E
0.8
E
0.6
E
0.4
ENE
0.5
E
0.6
E
0.5
E
0.4
ESE
Period(s) (?)1816151518188912111111111110985888
Wave
Graph
(?)Metric surfscale
Energy (?)107941482153781211962627874546485296232156135604522504636
Wind
(km/h)
5
E
15
E
10
NE
20
ENE
25
ENE
20
NNE
20
NNE
10
SE
15
SSW
10
SW
20
S
20
SSW
20
S
20
S
10
S
10
SSE
15
ESE
10
S
15
W
20
W
20
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glassoncross-
on		cross-
on		cross-
on		crosscrosscross-
on		cross-
off		cross-
off		crosscross-
off		cross-
off		crosscrosscross-
on		cross-
on		crossoffoffoff
High Tide
/ height (m)
9:34AM
2.63
9:47PM
3.10
10:32AM
2.72
10:43PM
3.14
11:22AM
2.80
11:33PM
3.15
12:08PM
2.86
12:20AM
3.12
12:51PM
2.90
1:05AM
3.06
1:31PM
2.92
1:48AM
2.97
2:10PM
2.91
2:30AM
2.86
Low Tide
/ height (m)
3:25PM
0.35
4:15AM
0.02
4:23PM
0.27
5:06AM
-0.03
5:15PM
0.20
5:53AM
-0.04
6:03PM
0.16
6:36AM
-0.02
6:49PM
0.13
7:17AM
0.04
7:33PM
0.14
7:56AM
0.13
8:16PM
0.18
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tuesday
26
Sunrise5:54--5:56--5:56--5:58--6:00--6:01--6:01--
Sunset-7:37--7:36--7:34--7:32--7:30--7:30--7:28-
light rain
light rain
mod rain
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
rain showers
thunderstorm
rain showers
clear
clear
part cloud
Rain (mm)
1110------------116---
Temp. °C171515181817212222262923242623242521232622
Feels °C (?)171314151414171820252720212322252622212219
  • 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 Massachusetts

  1. weather stationWind Update Continuing clean conditions at Winthrop Jetty (calm at Winthrop 4 km from Winthrop Jetty). 0.3m 8s swell from the E with a 0.2m 15s groundswell from the ESE and a 0.2m 3s local chop from the E. 3 swells combining to make bigger set waves.

    55 minutes ago Winthrop Jetty
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Actual: 55 min ago

3 km/h
E
Clean
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 Winthrop Jetty 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 Winthrop Jetty at:
surf-forecast.com

Information about the Winthrop Jetty Surf forecast

The above surf forecast table for Winthrop Jetty provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Winthrop Jetty can be found by selecting the local surf guide option on the grey menu. Our Winthrop Jetty 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 (Winthrop Jetty) 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 Winthrop Jetty 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.

Winthrop Jetty is 4 km (2 miles) from Winthrop. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Winthrop. Winthrop has rooms for a wide range of budgets as well as car hire and transport links.

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