St Catharines surfForecast / Lake Ontario / Canada

information circle12 Day Weather and Surf, issued 1 am Tuesday 01 Jul 2025 EDT
Forecast update in hr  min  s Forecast update imminent
St Catharines surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's St Catharines sea temperature is
18.3° C
(Which is normal for this time of year)
Updates in  hr  min  s Forecast update imminent
Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
Period(s) (?)------------------------------------
Wave
Graph
(?)Metric surfscale
Energy (?)000000000000000000000000000000000000
Wind
(km/h)
15
W
20
SW
15
W
10
WSW
25
SSW
10
WSW
10
NW
10
SW
10
W
5
NNE
5
ESE
10
SSW
15
WSW
30
SSW
15
SSW
25
SW
25
SW
20
SSW
25
W
15
WNW
20
NNE
20
NE
15
ENE
10
ENE
20
NE
10
NE
5
W
10
W
15
S
10
S
20
W
20
W
10
WSW
10
W
25
SSW
10
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
offcross-
off
cross-
off
offoffcrossoffcross-
off
oncrosscross-
off
offoffoffoffoffoffcross-
off
cross-
off
ononcross-
on
cross-
on
ononglasscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
High Tide
/ height (m)
n/a
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n/a
Low Tide
/ height (m)
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
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Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunrise5:39--5:39--5:41--5:41--5:41--5:41--5:43--5:43--5:45--5:45--5:46--5:47--
Sunset-9:00--9:00--9:00--8:59--8:59--8:59--8:58--8:58--8:58--8:57--8:57--8:55-
part cloudthunderstorm clearclearclearrain showersclearthunderstorm clearclearclearclearclearclearclearclearclearrain showerspart cloudpart cloudcloudcloudpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudclearclearthunderstorm clearclearclearclearclear
Rain (mm)
-1---1-2---------1------------4-----
Temp. °C232624222624212424202625273027283028222420172022202121232725242725232826
Feels °C (?)232523222522202424202524293026272929212317141822182223242725232522232625

Short Range Forecast: Light rain (total 4mm), mostly falling on Thu afternoon. Warm (max 26°C on Tue afternoon, min 19°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Some drizzle, heaviest during Sun night. Warm (max 30°C on Sat afternoon, min 18°C on Fri morning). Winds increasing (calm on Fri morning, fresh winds from the SW by Sun afternoon).

Days 6-9 Weather Summary Mostly dry. Warm (max 24°C on Mon afternoon, min 16°C on Mon night). Wind will be generally light.

Long Range Forecast: Light rain (total 4mm), mostly falling on Fri morning. Warm (max 28°C on Sat afternoon, min 19°C on Fri night). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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Information about the St Catharines Surf forecast

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

Are you planning a holiday in Lake Ontario - Canada? If you are looking for accommodation near St Catharines, camping, hotels and holiday cottages in Lake Ontario - Canada, consider staying in Saint Catharines which is 13 km (8 miles) away. Other places in and around Lake Ontario - Canada where you can find information about places to rent, and car hire include Thorold which is 18 km (11 miles) away, Niagara Falls, Niagara Falls and Welland.

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