SS Hesper (Wreck)
When diving at the SS Hesper, divers should note that there is relatively little wildlife in the area. The most common marine life found here are gobies, with the possibility of encountering lake trout or whitefish. It is important to be cautious while diving to avoid kicking up silt and reducing visibility.
With a visibility of approximately 7m, the SS Hesper offers a suitable diving experience for both beginner and advanced divers. The maximum depth of the dive site is 13m.
Located in Silver Bay, Minnesota, the SS Hesper is easily accessible from the Silver Bay Marina on Bayside Park Road. The shipwreck is a significant historical site, attracting divers from all over to explore its remnants.
For more information about the SS Hesper and its historical background, you can visit the following sources:
- MNHS Shipwrecks
- Wikipedia
Specifications of the SS Hesper:
- Namesake: Hesperus, the evening star
- Builder: Ship Owners Dry Dock Company, Cleveland, Ohio
- Launched: June 28, 1890
- Sank: May 4, 1905
- Displacement: 1540 long tons (1560 metric tons)
- Length: 250 ft (76.2 m)
- Beam: 41.6 ft (12.7 m)
- Draught: 20.2 ft (6.2 m)
- Propulsion: Vertical triple-expansion reciprocating steam engine, 825 horsepower
- Complement: Captain E.H. Heaton and a crew of 15
Diving Conditions Score for SS Hesper (Wreck)
Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for SS Hesper (Wreck)
Depth
13m
Visibility
7m
Experience Level
Weather Conditions for SS Hesper (Wreck)
Wave Height
0.02m
Wind Speed
5.8 m/s
Water Temp
18°C
Visibility
24.6km
Cloud Cover
0%
Wave Period
2.1s
Air Temperature
18.6°C
Precipitation
0 mm
Dive Score Chart for SS Hesper (Wreck)
Best time to dive: 14:00 with score 8.569098412698413/10. Water conditions: Waves 0.08m, Wind 3.2 m/s.Best night dive time: 1:00 with score 8.01/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at SS Hesper (Wreck) are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.
Score: 8.6/10
Waves: 0.08m (2.1s), Wind: 3.2 m/s
Score: 8.5/10
Waves: 0.14m (2.05s), Wind: 2.2 m/s
Score: 8.0/10
Waves: 0.16m, Wind: 2.9 m/s
Seasonal Analysis for SS Hesper (Wreck)Alpha
Historical patterns and best seasons for diving at SS Hesper (Wreck)
The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.
Monthly Dive Score Analysis - Seasonal Diving Conditions
Higher values indicate better diving conditions
Seasonal DiveScore Chart
This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.
Higher values indicate better diving conditions
Best Season for SS Hesper (Wreck)
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for SS Hesper (Wreck)
Ideal Conditions for SS Hesper (Wreck)
Water Temp
17.9°C / 64.2°F
July
Visibility
14.9m / 48.9ft
December
Wave Height
1.1m / 3.6ft
February
Wave Period
8.0s
January
Seasonal Insights for SS Hesper (Wreck)
SS Hesper (Wreck) shows typical northern hemisphere patterns with July being the warmest month (17.9°C) and January the coldest (-16.5°C). The calmest conditions typically occur in February with average wave heights of 1.1m and wave periods of 8.0s. The most comfortable wave conditions are in February with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). March is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during February to April, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.
Last updated: 1 min. ago - Jun 21, 2026