A Caribbean paradise- lush tropical vegetation, palm trees, sandy beach, turquoise water, warm sunshine.  If rain isn't in your vision of your tropical vacation, it might be time to adjust your vision.  All those beautiful tropical blooms and vivid green plants need water, so the rain is bound to come from time to time, and if you've been here in the last few weeks, you'll have learned that sometimes, it comes in abundance.  We're coming to the end (hopefully!) of our rainy season, and this year has been very, very wet.   Investing in some rain gear (an umbrella or rain coat, maybe even getting some rain boots) makes rainy days way more enjoyable- yes, there can be enjoyment in the rain!  Let your inner child come out, and get out to splash in the puddles!  So other than dancing in the rain, what's there to do when it's wet outside? 
1. Tour the island.  Sometimes it's rainy in one area, and not in the other, and chances are, if you're driving around, you'll have a few lulls in the weather to get out and check out some sites (pose by the 'ROATAN' sign, sample jams at Marble Hill Farms, see the mangrove channels up by Oakridge and Jonesville)
2. Visit Carambola Botanical Gardens.  Maybe not if it's teeming down, but a light drizzle or overcast day shouldn't deter from the natural beauty of the gardens, and there's a great view at the top
3. Take a dive course- you'll be spending some time in the classroom and doing confined water training, so the rain won't interfere with that, and when it's time for your dives, if it's choppy on one side of the island, it's usually flat on the other side, so you'll still get to dive (and you're getting wet anyway, so the rain won't matter)
4. Get creative and do some art.  Sip and Dip Roatan offers paint nights at a few different spots around the island (we've done one at the hostel, it was lots of fun).  Waves of Art has been hosting stained glass workshops.  
5. Volunteer- the SOL Foundation has a community center in Sandy Bay, or help out at the Sand Castle Library or Care 4 Communities: all 3 have indoor facilities that you can help out in.
6. Enjoy some down time: read a book, catch up on your travel blog, organize photos, play a board game, do a puzzle
7. Practice making new cocktails :)

For getting out exploring short distances, a car rental isn't needed in Roatan.  We have great, efficient bus and taxi systems that are inexpensive, with one route running between West End, Sandy Bay and Coxen Hole, and another going eastwards from Coxen Hole to French Harbour (with the bus continuing as far as Oakridge), and a 3rd route going from Coxen Hole to Flowers Bay.  However, to explore the far east side of the island, on the dirt road to the beautiful beach of Camp Bay, a car rental is an excellent idea, as buses don't run that far, and taxis generally want a lot to go that distance.
Car rentals start around $35-$40/day.  If you're staying at the hostel, I have a contact that does drop offs and pick ups at the hostel included in his rate, and charges $45/day, without security deposit, rather than a freeze on a credit card.  If you're traveling on your own, the hostel's a great spot to meet other travelers to split on the cost of a rental vehicle, which can make exploring the east end very cost effective.  I also have a couple of coolers that I'm happy to lend out, if anyone wants to take a picnic lunch along.
So what's worth seeing while you're out exploring?  Definitely check out Camp Bay- you might be the only ones on the beach, so it's a welcome change from the hustle and bustle of West Bay (no one selling you massages, bracelets or hair braiding).
 While you have the car to adventure with, you might also want to check out Oakridge, with all the houses set on stilts over the water, and where the mangrove tours depart from.  Along the main road, you'll see a huge pirate ship replica, which was (very briefly) a night club, until the owner was apprehended by the DEA, he was money laundering and part of a Mexican drug cartel.
There are some beautiful views as you drive along the east side.  If you need a food stop, there are a few good restaurant choices.  At Camp Bay, a bit east of the main public beach (a bit of a walk, you might want to drive further up), there's La Sirena, right on the water at the end of a dock.  If you do the mangrove tour in Oakridge, you could ask for a stop at Hole in the Wall, a quirky bar/restaurant on the water frequented by yachties, that you can only access by boat (if you don't do the mangrove tour, drive into Jonesville to the very end, and ask someone to call them for you, and they'll send a skiff to pick you up).   The Blue Mermaid Cafe is another option that's just accessible by boat- it recently opened, so I haven't had a chance to check it out, but it's on my list the next time I'm up that direction.
On the road heading out to Camp Bay, you'll pass Marble Hill Farms, where they sell a variety of tropical jams and jellies.  If you're out exploring on a Sunday, check out Punta Gorda in the afternoon: it's the Garifuna village, and on Sundays, they do their dancing and drumming and sell some of their traditional dishes.
The Daniel Johnson Monkey and Sloth Hangout in French Cay is a fun stop (closed Sundays), and The Buccaneer in French Harbour is a great place to spend a few hours, in one of their hammocks over the water.
On the road connecting Coxen Hole to Flowers Bay (a road that runs parallel to the Sandy Bay road), there's the 'ROATAN' sign that you can pose by, as well as a cameo factory, and Steel Pan Alley is in that area, if you'd like to do a steel drum lesson.
On the road between West Bay and West End, you'll pass by the Roatan Rum Factory, and just across the road, the Lighthouse is a lookout tower with a beautiful view, costs a couple of bucks to go up and take a look.