LSTM for time series forecasting with H20.ai
Active development on H2O's Deep Water project has stopped, see here: https://github.com/h2oai/deepwater

I don't think LSTM was included in the last release, and I would use Keras instead.

A list of Jupyter notebook demos is found here as well: https://github.com/h2oai/h2o-3/tree/master/examples/deeplearning/notebooks