Lowrance WM-4 SiriusXM Satellite Weather & Radio Module
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Real-Time Satellite Weather & SiriusXM Radio for Your Chartplotter
The Lowrance WM-4 brings professional-grade satellite weather data directly to your compatible Lowrance chartplotter. Paired with a SiriusXM® Marine subscription, it delivers live weather radar, lightning tracking, storm alerts, sea surface temperatures, and fish mapping overlays — all updated in real time while you're on the water. Compatible with Lowrance HDS LIVE and HDS Carbon multifunction displays.
Key Features
- Real-time SiriusXM® marine weather data streamed to your chartplotter
- NEXRAD weather radar with storm cell attributes
- Lightning detection, weather alerts, and watch boxes
- Detailed NOAA Marine Zone Forecasts
- Sea surface temperature overlays (offshore subscriptions)
- Wind and wave forecasts, plus buoy data (offshore subscriptions)
- Fish Mapping — target specific species based on water conditions
- Compact receiver with deck or pole-mount installation options
- Compatible with Lowrance HDS LIVE and HDS Carbon displays
- SiriusXM® audio add-on available: access 140+ radio channels at a bundled discount
Kit includes: Receiver, antenna, 7 ft. power cable, 7 ft. Ethernet adapter, 7 ft. weather/audio cable, and installation hardware.
SiriusXM® subscription sold separately through SiriusXM.
Parts Desk Insights
Best use case: The WM-4 is the go-to upgrade for anglers and offshore cruisers running a Lowrance HDS LIVE or HDS Carbon display who want live weather and fish mapping without a separate device. It's especially valuable for offshore fishing where sea surface temperature and fish mapping overlays can make a real difference in finding productive water. If you're running an inland subscription, note that SST, wind/wave forecasts, and buoy data are not included — those features require an offshore-tier plan.
Pair it with: Browse our Lowrance Eagle 9 Fish Finder or Lowrance Eagle 7 Fish Finder for a complete Lowrance electronics setup.
Subscription note: The WM-4 requires an active SiriusXM® Marine subscription to receive weather data. Audio channels can be added to any Marine Weather or Fish Mapping plan at a discount.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.