About John's Boat Harbor
Located at 2407 Hwy C, St Charles, MO 63301, United States Member only Marina on the Mississppi River Upper Mississippi River Mile Marker 231.8
Facilities
Electricity
Petrol
Water
Showers
Toilets
BoatbuilderCOORDINATES
38.87821 N, -90.62325 E
Port Information
Telephone
Berth Sizes
< 10m, 10-20m
Depth at MLW
< 2m
Manoeuvrability
Fair
Channel Marking
Fair
Port of Entry
No
Overseas Visitor Berths
Yes
Dock Type
Floating
Style Side To
Yes
Tidal Flow
Beware
Active Winter
Yes
Weather Forecast
Thu
5AM - 9AM
09 April 2026
SW 6–8 knots. Gusts up to 25 knots.
9 to 16°C
UV Index: 0 - Low
Partly cloudy
Thu
9AM - 1PM
09 April 2026
- SW 7 knots increasing to 10 knots. Gusts up to 18 knots.
- Increasing from 13 to 21°C
- UV Index: 6 - High
- Mostly fine
Thu
1PM - 5PM
09 April 2026
- SW 10 knots decreasing to 8 knots. Gusts up to 16 knots.
- 24°C
- UV Index: 6 - High
- Partly cloudy