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
Fri
5AM - 9AM
15 May 2026
SE 6 knots increasing to 10 knots. Gusts up to 25 knots.
Increasing from 10 to 14°C
UV Index: 0 - Low
Cloudy
Fri
9AM - 1PM
15 May 2026
- S 8–12 knots. Gusts up to 22 knots.
- Increasing from 15 to 25°C
- UV Index: 8 - Very High
- Partly cloudy
Fri
1PM - 5PM
15 May 2026
- S 7–10 knots.
- Increasing from 26 to 29°C
- UV Index: 8 - Very High
- Cloudy