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Sport Boat

Sea Ray SLX 400

You need a space at least 45′ 9″ long.

At RV Storage Depot that’s a 12×48 space.

Length
39′ 9″hull
On trailer
42′ 9″estimated
Beam
—not published
Height
—not published

Sea Ray doesn’t publish an on-trailer length for the SLX 400. We add about 3′ for the trailer and tongue: 39′ 9″ + 3′ = about 42′ 9″ on the trailer.

Sea Ray SLX 400 in a 12′ by 48′ spaceTop-down drawing to scale. The vehicle is 42′ 9″ long on its trailer and of unpublished width, leaving 5′ 3″ of length.42′ 9″ est. on trailer48′ space5′ 3″ spareWidth not published · space 12′ wide
To scale: your boat on its trailer in a 12×48 outdoor self parking space.

Outdoor works well for this one

A secured outdoor space with a good cover is plenty for most runabouts and pontoons. Want it ready at the gate on Saturday morning? That’s what valet is for.

Where to store it

  1. RV Storage Depot – Great Park

    Irvine, CA

    Outdoor Self Parking12×48Available

    Fits. 5′ 3″ of length to spare. Your on-trailer length is our estimate, so measure it before you book.

    Reserve this 12×48 on the next page

    Availability as of 2026-10-26, approximate.

  2. RV Storage Depot – Norwalk facility

    RV Storage Depot – Norwalk

    Norwalk, CA

    Indoor Valet10×50Full right now

    Fits. 7′ 3″ of length to spare. Your on-trailer length is our estimate, so measure it before you book.

    Sea Ray doesn't publish a height for this model, so we can't say whether it clears the 14′ indoor door. Measure the boat's height on its trailer, from the ground to the top of the bimini or tower, then call the Norwalk office.

    Call to confirm height · (562) 921-8231

    Availability as of 2026-10-26, approximate.

  3. RV Storage Depot – Altamonte Springs

    Altamonte Springs, FL

    Outdoor Self Parking12×65Only 1 left

    Fits. 22′ 3″ of length to spare. Your on-trailer length is our estimate, so measure it before you book.

    Call to reserve · (407) 875-8111

    Availability as of 2026-10-26, approximate.

  4. RV Storage Depot – McClellan Park

    McClellan Park, CA

    Indoor valet only here.

    Indoor Valet tops out at 45′.

    Availability as of 2026-10-26, approximate.

Reserve opens RV Storage Depot’s checkout: no call needed.

Keep reading

GuideIndoor, outdoor, or valet for a tower boatWhat the sun does to gelcoat and vinyl, and when door height is the catch.How-toMeasure your boat on its trailerThree numbers, one tape, five minutes. Bring them when you book.

How we sized it

  • Length needed: 42′ 9″ (39′ 9″ hull + about 3′ for the trailer and tongue, estimated) + 3′ to back in and close up = 45′ 9″.
  • Width: not published by the manufacturer. Width never rules out a space; up to 8′ 6″ fits.
  • Indoor: height + 1′ must clear the indoor door listed for the space.
  • Specs: Sea Ray published specifications, checked 2026-11-02.
  • Vehicle Storage Size Guide methodology
  • Last updated 2026-11-02.

Want to know if we open near you?

Leave your ZIP code and email. If RV Storage Depot opens a storage location near you, we'll send you one email to say so. We can't promise that will happen, and we won't email you about anything else.