If you keep a boat on the Solent, you already know the season doesn’t really end in September — it just changes shape. The sailing slows down, but for your boat, autumn is one of the busiest and most important periods of the year. Get winterisation right, and you’re protecting the investment you’ve made all summer. Get it wrong, or leave it too late, and you’re looking at a much more expensive spring.
Here’s a realistic timeline, built around how the Solent’s marinas and trades actually work through the season.
Late September: Book Before You Think You Need To
The single biggest mistake boat owners make isn’t skipping winterisation — it’s leaving it too late to book. Haul-out slots and lift-out bookings fill up fast once the weather turns, and yards work through a queue, not a walk-in service. If your boat needs lifting out for the winter, late September is the right time to get on the list, even if the actual work happens in October or November.
This is also the point to book your engineer for a pre-winter service, if you haven’t already. Interestingly, individual marine engineers and riggers are often quieter in early autumn than you’d expect — once the summer sailing rush ends, many have more availability, not less. That’s good news for you: it’s often easier to get a proper, unhurried service booked now than it will be in high summer.
Early-Mid October: The Core Winterisation Work
This is when most of the physical work happens for boats coming out of the water:
- Engine servicing. Oil and filter changes, impeller checks, fuel system inspection — leaving diesel sitting untreated over winter is one of the most common causes of spring starting problems.
- Antifouling assessment. Once lifted, this is your chance to see the hull properly and decide whether it needs attention before next season, rather than discovering a problem in a rushed spring haul-out.
- Rigging inspection. Autumn lift-out is a natural moment to have your rigging checked while the boat’s out of the water and easier to assess — more on what to look for below.
- Water systems. Draining or treating fresh water systems, and the heads, prevents frost damage that can be expensive and unpleasant to discover in March.
Late October–November: Cover, Storage, and the Final Checks
Once the major mechanical work is done, attention turns to protecting the boat through the winter months itself:
- Covers and canvas work. A well-fitted winter cover does more to protect your boat’s condition than almost anything else on this list — poorly fitted or missing covers lead to water ingress, UV damage, and mould over a long winter.
- Battery care. Batteries left in a cold, unused boat lose charge and can be damaged if fully discharged — either remove them for storage or arrange a maintenance charge.
- A final walk-round. Hatches, seacocks, and anything that could let water in over a long, unattended winter deserve one last check before you leave the boat for the season.
Why the Timing Actually Matters
None of this is about being precious — it’s about cost. A boat that’s properly winterised avoids the classic spring problems: an engine that won’t start, a hull that needs unplanned work before it can go back in the water, or water damage that could have been prevented by a well-fitted cover. Every one of those problems costs more to fix in a rush in April than it would have cost to prevent in October.
It’s also worth saying plainly: this list covers what to be aware of, not a substitute for a qualified professional actually doing the work. Rigging inspection in particular is a safety-critical job — if in doubt, always have standing rigging assessed by a qualified rigger rather than relying on a visual check alone.
Getting It Booked
The trades who do this work well — riggers, engineers, valeters, GRP specialists — are often small, local operations who get booked through word of mouth rather than big advertising budgets. If you’re not sure who to call for any of the jobs above, Salty Jacks is building a vetted directory of exactly these Solent-based marine trades, so you’re not starting from a cold Google search when the season turns.
