About River Island Marina
38.91186° N, 90.49404° W Boat/Rv services St. Charles, MO The River Island Marina offers a family friendly environment in an open and natural setting with covered slips that look across the channel into our private, wooded island. We have excellent boat launch ramps, plenty of parking, 24-hour restroom access, and a great environment.
Facilities
Electricity
Water
ToiletsCOORDINATES
38.91205 N, -90.49376 E
Port Information
Telephone
Berth Sizes
< 10m
Depth at MLW
2 - 3m
Manoeuvrability
Fair
Channel Marking
Fair
Port of Entry
No
Overseas Visitor Berths
No
Dock Type
Floating
Style Side To
Yes
Tidal Flow
Negligible
Active Winter
Yes
Weather Forecast
Fri
5AM - 9AM
06 February 2026
SW 8 knots increasing to NW 11 knots. Gusts up to 21 knots.
Increasing from 1 to 5°C
Sunny
Fri
9AM - 1PM
06 February 2026
- NW 10 knots increasing to 14 knots. Gusts up to 25 knots.
- 5 to 9°C
UV Index: 2 - Low- Mostly fine
Fri
1PM - 5PM
06 February 2026
- NW 14 knots decreasing to 12 knots. Gusts up to 25 knots.
- 4 to 10°C
- UV Index: 1 - Low
- Partly cloudy