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Surf Forecasts

Union Bay surfForecast / Lake Superior / USA

information circle12 Day Weather and Surf, issued 1 pm Tuesday 01 Jul 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Union Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Union Bay sea temperature is
9.8° C
 (Which is 3.0°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Union Bay this week:

The most powerful waves expected at Union Bay in the next 12 days are 0.6m 4s and forecast to arrive on Sunday (Jul 06) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Tuesday (Jul 01) at 5PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sun 6th Jul)2ft (0.6m) 4s

Table - best surf conditions forecast for Union Bay over the next 12 days.

Hourly12 Days
Lake Superior Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Tue
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sun
13
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
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
See all maps
Wave Height (m) & direction (?)
1.2
WSW
0.6
WSW
0.4
WSW
0.4
WSW
0.3
WSW
——
0.4
ESE
0.4
SE
0.3
SSE
0.6
SSW
0.7
SW
0.8
SW
0.6
W
0.5
NW
0.4
WSW
————————————————————
Period(s) (?)55344--443444434--------------------
Wave
Graph
(?)Metric surfscale
Energy (?)0000000000000105000000000000000000000
Wind
(km/h)
20
WSW
20
WSW
15
W
15
W
5
S
10
ENE
10
NE
10
S
5
W
5
SW
20
SSW
20
SSW
5
W
10
ENE
25
NE
15
NE
10
W
5
N
10
NE
15
SSE
15
SE
10
ENE
20
SSE
20
S
15
SSW
15
SSW
5
WNW
5
E
15
SW
20
W
15
WSW
20
WSW
5
WSW
5
SSW
5
SE
5
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		crosscrossglasscross-
on		cross-
on		offcrossglasscross-
off		cross-
off		glasscross-
on		cross-
on		cross-
on		crossoncross-
on		cross-
off		cross-
off		cross-
on		offoffoffoffglasscrosscross-
off		crosscross-
off		cross-
off		glassglasscross-
off		glass
High Tide
/ height (m)
n/a
n/a
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n/a
n/a
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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Tue
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sun
13
Sunrise--6:07--6:09--6:09--6:09--6:11--6:11--6:11--6:13--6:13--6:15--6:16--6:16
Sunset9:55--9:55--9:54--9:54--9:54--9:53--9:53--9:52--9:52--9:52--9:52--9:51--
clearpart cloudclearpart cloudthunderstorm clearpart cloudpart cloudpart cloudpart cloudclearpart cloudthunderstorm heavy raincloudcloudrain showerspart cloudclearclearclearcloudpart cloudcloudrain showersclearclearpart cloudpart cloudpart cloudclearclearclearcloudheavy rainlight rain
Rain (mm)
----1-------1135--4-------1---------181
Temp. °C242318202017191922252625232212111113141418212019212119212218212419211815
Feels °C (?)2120161820161717242728252426981011121215191816202020222317202319222014

Short Range Forecast: Some drizzle, heaviest during Wed night. Warm (max 24°C on Tue afternoon, min 15°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 50mm), heaviest during Sat night. Warm (max 26°C on Fri night, min 9°C on Sun night). Wind will be generally light.

Days 6-9 Weather Summary Some drizzle, heaviest during Wed afternoon. Warm (max 21°C on Tue afternoon, min 11°C on Mon night). Wind will be generally light.

Long Range Forecast: Moderate rain (total 19mm), heaviest on Sat night. Warm (max 24°C on Fri night, min 15°C on Sun morning). 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Union Bay 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 Union Bay at:
surf-forecast.com

Information about the Union Bay Surf forecast

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

Union Bay is 173 km (107 miles) from the city of Marquette. If you plan a vacation in Lake Superior, look for hotels and other accommodation in Marquette. Marquette has rooms for a wide range of budgets as well as car hire and transport links.

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